sign in sign up
<<
Home , Damasonium, Echinodorus subalatus, Hydrocleys, Hydrocleys nymphoides, Ottelia, Sagittaria guayanensis

Revista Brasil. Bo1., v'27, n.3, p.439-452,jul.-se1. 2004

Alismatales from the upper and middle Araguaia river basin () SAMANTHA KOEHLER1,3 and CLAUDIA PETEAN BOVE2

(received: October 30, 2002; accepted: March 25, 2004)

ABSTRACT - ( ITomthe upper and middleAraguaia river basin (Brazil». The present study deals with a survey of the order Alismatales (except Araceae) in the upper and middle Araguaia River region located between the states of Mato Grosso and Goiás, Brazil. Field expeditions were carried out during the rainy and dry seasons. The route covered approximately 2,000 km and 41 aquatic environments were visited. Thirteen taxa, representing the farniliesAlismataceae (nine), (three) and Najadaceae (one) were identified. Keys for the identification of families and species in field, brief diagnoses, schematic illustrations and relevant comments were elaborated based on field observations as well as on the analysis ofthe specimens collected.

Key words - Alismatales, aquatic , Araguaia river, Brazil, hydrophytes

RESUMO - (Alismatales da bacia do alto e médio rio Araguaia (Brasil». Realizou-se o levantamento de espécies da ordem Alismatales (exceto Araceae) ocorrentes na região do alto e médio rio Araguaia, entre os estados de Mato Grosso e Goiás, Brasil. As expedições para coleta de material, ocorridas tanto na época 'de chuvas quanto na seca, totalizaram cerca de 2.000 km percorridos, abrangendo 41 ambientes aquáticos. Foram identificados treze táxons pertencentes às famílias (nove), Hydrocharitaceae (três) e Najadaceae (uma). Foram elaboradas chaves para identificação em campo das famílias e espécies, descrições breves, ilustrações esquemáticas e comentários relevantes, baseados em dados levantados em campo e através da análise do material coletado.

Palavras-chave - Alismatales, Brasil, hidrófitas, plantas aquáticas, rio Araguaia

Introducôon cattle nourishment (Berg 1984, Joyce 1990). However, the excessive growth of some species may interfere Brazil has the largest hydrographic net of the world, with the functioning ofhydroelectric turbines, favor the estimated as 6,950 km2,representing the largest hydric proliferation of mosquitoes, reduce water oxygen supply of (Tundisi & Barbosa 1995). concentration, and prevent navigation (Esteves 1988, Plants encountered growing in permanent or seasona11y Palombo & Pereira 1992). wet environments, whose photosynthetic parts are Despite the great diversity ofhydrophytes in Brazil constant1y or at least for several months each year in (Hoehne 1948), there is still a lack of studies on the contact with water are defined by Cook (1996) as ecological and systematic aspects of Brazilian aquatic vascular aquatic plants. The aquatic flora plays an plants (Pott et ai. 1992). Besides the work of Hoehne important role on the ecology of aquatic ecosystems. It (1948) on aquatic plants of Brazil, there are studies, affects the water chemistry by the assimilation of genera1lytaxonomically and/or geographically restricted, nutrients and noxious substances (Esteves & Camargo developed fortheAmazonian region (Albuquerque 1981) 1986) and provides favorable conditions to innumerous and for the states of Goiás (Wanderley 1989), Mato organisms, such as fishes, aquatic arthropods, mo11usks Grosso (Prado et ai. 1994, Schessll997) Mato Grosso and periphyton (Esteves 1988,Pott & Pott 1997).Aquatic do Sul (Guimarães 1999; Pott 1993, Pott & Pott 1997, plants also constitute the base of an extensive food chain Pott et ai. 1989, 1992, Pott & Cervi 1999, Pott & Pott (Esteves 1988, Niering 1985) and some species may 2000 [Pantanal]), Minas Gerais (Pedralli et ai. 1993a, even be used as ornamental plants, soil fertilizers or for b), Rio de Janeiro (Henriques et ai. 1988, Bove et ai. 2003), Rio Grande do Sul (Almeida-Rego 1988, Irgang et ai. 1984,Irgang & Gastal1996, Pedralli, 1981), Santa Catarina (Pedersen & Klein 1976)and São Paulo (Abreu i. Universidade Estaduai de Campinas, instituto de Biologia, Departamento de Botânica, Caixa Postal 6i09, i3083-970 1981, Faria 1998). Campinas, SP, BrasiL The order Alismatales, with roughly 3,320 species, 2. Universidade Federai do Rio de Janeiro, Museu Nacional, Departamento de Botânica, Quinta da Boa Vista, 20940-040 consists most1y of aquatic or wetland plants and is Rio de Janeiro, RJ, BrasiL [email protected] represented in Brazil by approximately 32 genera and 3. Corresponding author: [email protected] 11 farnilies (Haynes & Holm-Nielsen 1985, Judd etaI. 440 S. Koehler & c.P. Bove: Alismatales from the Araguaia river, Brazil

1999, Les & Haynes (995). Ageneric treatment ofthe order in the Neotropics has been published by Haynes & Holm-Nielsen (1985), besides surveys and taxonomic treatments on the familiesAlismataceae (Almeida Rego 1988, Guimarães 1999, Haynes & Holm-Nielsen 1994, Rataj 1978), Hydrocharitaceae (Cook 1985, Cook & Urmi-Kõnig 1984a, b), , inc1uded in Alismataceae in this paper (Haynes & Holm-Nielsen (992), and Najadaceae (Lowden 1986). Despite the fact most studies of aquatic plants /' published so far for the central region of Brazil are geographically and/or taxonomically restricted, there are stillinnumerousaquatichabitatsinthisregionthatarepoorly known. This assertion was corroborated by the discovery of a new species of Hydrocharitaceae, Egeria heterostemon S. Koehler & C.P. Bove, during the development ofthis study (Koeh1er& Bove 2001). The purpose ofthis study is to contribute to the knowledge of the Brazilian aquatic florapresenting a survey ofthe order Figure I. Geographicallocation of the study area. Alismatalesofthe upperand middleArnguaiaRiverregion.

Material and methods Species identifications were based on the taxonomic treatments available and were complemented by comparisons with herbaria material. The material was deposited in the The study area is located on the Araguaia Tocantins - herbarium ofthe Museu Nacional do Rio de Janeiro (R) and depression, in the states of Mato Grosso and Goiás, Brazil. duplicates were sent to the to herbaria of the Universidade The climate, warm and wet, is composed oftwo main seasons: de São Paulo (SPF) and to Embrapa - Pantanal (CPAP). Keys a dry one from June to November foIlowed by a rainy season for the identification ofthe families and species in the field, from Oecember to May (lBGE 1989). The vegetation is brief diagnoses, schematic illustrations and relevant characterized mainly by the Cerrado type, rather devastated, ecological and morphological comments were elaborated and by riparian forests and aquatic ecosystems, hitherto weIl based on an analysis of specimens coIlected, as weIl as on preservcd. Field cxpcditions were undertaken in 1997 field observations. (May-June and October) and in 1999 (November), covering the rainy and dry seasons. Specimens were coIlected in 41 different aquatic environments along the roads indicated in Results and Discussion figure I, covering an extension of approximately 2,000 km. The sites visited consisted mainly of permanently and In the treatment that follows thirteen taxa were temporaIly undrained floodplains. recognized.

Key to families of Alismatales of the upper and middle Araguaia river region

I. Submersed plants 2. sessile, I-veined, margins serrulate 3. Leaves with sheathing base, margins with visible serrulations; laeking a perianth, ineonspieuous Najadaeeae 3. Leaves without sheathing base, margins without visible serrulations; flowers eonspieuous, with white perianth Hydroeharitaeeae 2. Leaves petiolate, multi-veined, margins entire 4. Leaves up to 10 em long; flowers white Alismataeeae 4. Leaves longer than 10 em; flowers yellow Hydroeharitaeeae I. Emersed plants ... Alismataeeae Revista Brasil. Bot., V.27, n.3, p.439-452,jul.-set. 2004 441

Alismataeeae Vento hypogynous, perfeet or imperfeet, pedicellate, perianth aetinomorphie, of 6 free segments in 2 series: 3, Herbaeeous, annual or perennial, glabrous or green, persistent; 3, larger than sepals, white to pubeseent, laetiferous. Stems eorm-like, rhizomatous or yellow sometimes with purple spots at the base, delieate, stoloniferous. Leaves submersed, fioating oremergent, deciduous; stamens 3 or numerous, free, staminodes basal or alterna te, petiolate with a sheathing base; oeeasionally present; earpels 3, 6 ormore, free or basally submersed leaves linear, sessile; emergent and floating fused, l-loeuled, ovules 1-2 or numerous of basal or leaves petiolate, the blade linear to laneeolate, ovate to laminarplaeentation, styles terminal or lateral sometimes rhomboid, pluriveined, with or without pellueid marks, very short or absent, stigma linear. aehenes or the margins entire. Infloreseenees vertieillate, panieulate, follicles, numerous, eompressed or terete, ofien winged, raeemose, spieate or umbellate, without a subtending longitudinally eostate and glandular, sometimes with a spathe, with whorled or separate braets. Flowers terminal or horizontal beak. Seeds U-shaped.

Key to species of Alismataeeae of the upper and middle Araguaia river region

1. Floatting leaves sagittate : : 5. guayanensis 1. Emersed leaves linear, laneeolate or ovate 2. Plants delieate, to 25 em tall 3. Pellucid lines on leafblades presenL L bo/ivianus 3. Pellueid lines on leafblades absent 4. Echinodorus tenel/us 2. Plants stout, taller than 40 em 4. Ovules ofbasal plaeentation 5. Floral braets subulate, usually longerthan the pedicels 3. Echinodorus subalatus 5. Floral braets laneeolate, usually shorter than the pedieels 6. Submersed leaves absent; flowers perfeet 2. Echinodorus longipetalus 6. Submersed leaves present; flowers, at least the lower, imperfeet 6. Sagittaria rhombifolia 4. Ovules oflaminar plaeentation 7. Blades ovate to orbieular, as long as wide 7. nymphoides 7. Blades at least twiee longer than wide 8. Leaves floating; earpels 3; staminodes 3 8. Hydrocleys parvijlora 8. Leaves ereet; earpels and staminodes numerous 9. lajoresth

I. Echinodorus bo/ivianus (Rusby) Holm-Niels., Commonname:"dwarf amazonswordplant","erva do Brittonia 31(2):276. 1979. Type: : Reyes, pântano"(Haynes& Holm-Nielsen1994,Pott& Pott2000). White J540 (leetotype NY, fide Haynes & Holm- Speeimens examined: BRAZIL: GOIÁS: Estr. Nielsen 1994; isoleetotypes, GH, K, NY, US). Jussara-Aragarças a 100 km de Jussara, 9-X-1997 (fi.), Figure 2A. c.P. Bove et ai. 238. (R, SPF). Habitat: amphibious or submersed , growing in Plants delieate, annual, glabrous, stoloniferous, to still or running water up to 50 em deep. Rare. 15 em tall. Submersed leaves present; emersed leaves Distribution: fromCentralAmerica to southern South petiolate, 10 em long, 1.0-1.5 em wide, the blade Ameriea. In Brazil, in Distrito Federal, Goiás, Mato laneeolate with a sheathing base, pellucid markings Grosso, Mato Grosso do Sul, Minas Gerais, Pará, present as lines. Infloreseenee umbelliform with only Paraná, Rio Grande do Sul, Rio de Janeiro, Santa one floral or raeemose with two whorls, ereet, Catarina and São Paulo (Haynes & Holm-Nielsen 1994). up to 25 em long, without vegetative proliferations. Braets triangular, basally united, eoarse with thin 2. Echinodorus longipetalus Mieheli, Monogr. Phan. margins, 0.5 em long, 0.1-0.2 em wide. Flowers perfeet, 3:60.1881. Type: :Cordillera dePeribebuy, 2-6, 1 em diam.; sepals appressed, 0.3 em long; petals Patino Cué, Balansa 570 (leetotype K, fide Rataj 1969; clawed, 0.3-0.4 em long; stamens 9, 0.1 em long, earpels isoleetotypes, G, K). 15-20. Fruits not observed. Figure 2B. 442 S. Koehler & c.P. Bove: Alismatales from the Araguaia river. Brazil

Plants stout, perennial, glabrous, to 200 em tall. Common name: "longstyled toadspoon", "chapéu Submersed leaves absent; emersed leaves petiolate, de couro miúdo" (Haynes & Holm-Nielsen 1994, Pott 40-120 em long, 10-15 em wide, with a sheathing base & Pott 2000). 5-15 em long, the blade laneeolate, pellucid markings Speeimens examined: BRAZIL: GOIÁS:Estrada retieulate. Infloreseenee raeemose, ereet or deeumbent, Jussara-Aragarças, a 3 km de Jussara, 9-X-1997 (fl., overtopping the leaves, without vegetative proliferations, fr.), CP. Bove et ai. 246 (R, SPF); Estrada Aruanã- 2-10 whorls with 3-15 flowers eaeh. Braets laneeolate Britânia, aiO kmde Britânia, 14-XI-1999 (fl.), CP. Bove with an attenuate apex, eoarse, 2 em longo Flowers et ai. 586 (R); Estrada para Peixe (GO-334), a 39 km perfeet; sepals ereet, eovering the mature , 1-1.5 em da GO-I64, 16-XI-99 (fl.), CP. Bove et ai. 624 (R). long, 0.5-1 em wide; petals 2 em long, 1.5-2 em wide; MATOGROSSO:Estrada Água Boa-Coealinho, a 100 km stamens numerous, 0.5 em long, earpels numerous. Fruits de Água Boa, 12-X-1997 (fl., fr.), CP. Bove et ai. 264 flattened, dorsally keeled, 0.3 em long, the beak lateral, (R). horizontal. Observations: we found specimens with vegetative Common name: "narrow-Ieaved Amazon proliferating infloreseenees (CP. Bove et ai. 246), a swordplant", "chapéu de couro" (Haynes & Holm- eharaeter not reeorded in previously taxonomie Nielsen 1994, Pott & Pott 2000). treatments of this species (Haynes & Holm-Nielsen Speeimens examined: BRAZIL: GoIÁs: Estrada 1994, Rataj 1978). Jussara-Aragarças, a 100 km de Jussara, 26-V-1997 Habitat: emergent plant, growing in still water up (fl.), CP. Bove et ai. 158, 159 (R); Estrada Aruanã- to 50 em deep; however, it may be found in the middle Britânia, a 33 km de Aruanã, 14-X-1997 (fl.), CP. Bove of rivers. Commonly found around the edges of marshes et ai. 295 (R); Estrada Jussara-Britânia, ea. de 40 km and as a dominant species in polluted environrnents. do trevo, 14-XI-1999 (fl., fr.), CP. Bove et ai. 577 Distribution: from Central Ameriea to south-eentral (R, SPF). MATOGROSSO:Estrada Água Boa-Coealinho, Brazil, states of Amazonas, Bahia, Ceará, Goiás, a 144 km de Água Boa, 12-X-1997 (fl., fr.), CP. Bove Maranhão, Mato Grosso, Mato Grosso do Sul, Minas et ai. 272 (R, SPF). Gerais, Paraná, Rio Grande do Norte, Rio de Janeiro, Habitat: emergent plant, growing in still water up Roraima, Santa Catarina and São Paulo (Haynes & to 50 em deep. Commonly found around the edges of Holm-Nielsen 1994, Pott & Pott 2000). marshes, usually presenting a high local abundanee. Distribution: Suriname and from central Brazil 4. Echinodorus tenel/us (Mart. ex Sehult. & Sehult. (states of Goiás, Mato Grosso, Mato Grosso do Sul, f.) Buehenau, Abh. Naturwiss. Vereines Bremen 2:21. Minas Gerais and São Paulo) to eastern Paraguay 1868. ==Alismatenel/um Mart. ex Sehult. & Sehult. f., (Haynes & Holm-Nielsen 1994, Pott & Pott 2000). Syst. veg. 7(2):1600.1830. Type: BRAZIL: Buritihaes, Contendas, CF.P. Martius a56 (leetotype M, fide Rataj 3. Echinodorus subalatus (Mart.) Griseb. subsp. 1975). subalatus, Cal. pl. Cubo p.218. 1866. == Alisma Figure 2E. subalatum Mart., Syst. veg. 7(2): 1609. 1830. Type: Plants delieate, annua!, glabrous, stoloniferous, to BRAZIL: s. loe., CF.P. Martius 150 (leetotype M, fide 6 em tall. Submersed leaves present, 5 em long, 0.2 em Rataj 1971; isoleetotype MO). wide, with a sheathing base 2 em long; emersed leaves Figure 2C-D. petiolate, 1.5-4.5 em long, 0.2 em wide, the blade linear- Plants stout, perennial, glabrous, 40-100 em tall. laneeolate with a sheathing base I em long, pellueid Submersed leaves absent; emersed leaves petiolate, markings absent. Infloreseenee umbelliform with only 23-55 em long, 1-8 em wide, with a sheathing base one floral whorl, ereet, up to 6 em long, without 6-15 em long, the blade laneeolate, pellueid markings vegetative proliferations.Bracts triangular,basally united, present as lines. Infloreseenee raeemose or panieulate, eoarse with delieate margins, 0.3 em long, 0.1-0.2 em ereet, 50-60 em long, with or without vegetative wide. Flowers perfeet, 2-28, 0.6-1 em diam.; sepals proliferations, 5-6 whorls with 5-10 flowers eaeh. Bracts appressed, 0.3 em long; petals clawed, 0.2-0.4 em long, subulate, eoarse, with delieate margins, 0.5-2 em longo 0.1-0.3 em wide; stamens 9, I em long, earpels 15-20. Flowers perfeet; sepals reflexed, 0.5 em long, 0.5 em Fruits not observed. wide; petals I em long, 0.5-1 em wide; stamens 20, Common name: "pigmy ehain-sword", "dwarf 0.4 em long, earpels numerous. Fruits terete, unkeeled, Amazonian sword plant", "erva do pântano" (Haynes glandular, 0.1-0.2 em long, the beak terminal, ereet. & Holm-Nielsen 1994, Pott & Pott 2000). Revista Brasil. Bot., V.2 7, n.3, p.439-452,jul.-set. 2004 443

Speeimens examined: BRAZIL: GoIÁs: Estrada Estrada para Peixe (GO-334), a 21 km da GO-164, Jussara-Aragarças, a 100 km de Jussara, 26-V-1997 16-XI-1999 (fi.), CP. Bove et ai. 622 (R, SPF). MATO (fi.), CP. Bove et ai. 161 (R); 9-X-1997 (fi.), CP. Bove GROSSO:Estrada Água Boa-Coealinho, a 58 km de Água et ai. 240 (R); Estrada Jussara-Britânia a 59 km de Boa, ll-X-1997 (fi.), CP. Bove et ai. 255 (R, SPF). Jussara, 14-XI-1999 (fi.), CP. Bove et ai. 581 (R); Habitat: amphibious or submersed plant, growing Estrada Jussara-Britânia (via Jaeilândia), a 59 km de in still water up to 50 em deep or in muddy soil. Jussara, 12-XI-l 999 (fi.), CP. Boveetal. 550 (R, SPF); Speeimens eolleeted in dry soi! were intensively

'\r 1-- \/t., tio I , ',.-, 11 .'. r-~'

I>'t, ..~ . ~'Y ~.' _J (~~ T0Q9 4JiZ ' , Fi ~r,t / I À .J.'tJ ," 1o~m -~ } ,,\.,,~ 'WN 11/fN }J. __"" ,t"I , l bo

'WI!/ i

4cm " , 10cml I., I I !B

Figure 2. Species of Echinodorus from the upper and middleAraguaia basin. A. E. bolivianus, habit. B. E. longipetalus, habit. C. E. subalatus, habit. D. E. subalatus, . E. E. tenel/us, habit (A: Bove et a/. 238, B: Bove et a/. 158, C-D: Bove et ai. 264, E: Bove et a/. 255). 444 S. Koehler & c.P. Bove: Alismatales ftom the Araguaia river, Brazil flowering eompared to flowering speeimens found in Habitat: floating-Ieaved plant, growing in still water wet environrnents.Frequent and usually 10caIlyabundant 50-100 em deep. A very eommon speeies in the Distribution: northeastem U.S.A. to southem Brazil, Araguaia riverregion, usually loeally abundant. states of Amazônia, Bahia, Minas Gerais, Goiás, Mato Distribution: from southem U.S.A. to and Grosso, Mato Grosso do Sul, Minas Gerais, Pará, Rio Brazil, states of Acre, Amazonas, Ceará, Goiás, de Janeiro, Roraima, Santa Catarina, São Paulo (Haynes Maranhão, Mato Grosso, Mato Grosso do Sul, Minas & Holm-Nielsen 1994, Pott & Pott 2000). Gerais, Pará, Piauí, Rondônia and Roraima (Haynes & Holm-Nielsen 1994, Pott & Pott 2000). 5. Sagittaria guayanensis Kunth subsp. guayanensis, Nov. gen. sp. 1:250. 1816.Type: : Guainia, 6. Sagittaria rhombifolia Cham., Linnaea 10:219.1835. Humbo/dt s.n. (holotype P?; fragment at MO; leetotype Type: BRAZIL: S. loe., Sellow s.n. (leetotype E, fide TCD, Rataj 1972; isoleetotypes LE, W). Rataj 1972; isoleetotype K, LE). Figure 3A-B. Figure 3C-E. Plants perennial, glabrous or pubeseent, to 50 em Plants perennial, glabrous, 50-100 em tal!. taIl. Stems present as eonns. Submersed leaves present, Submersed leaves present, ea. 50 em long, 0.5 em wide; 0.5-1 em long; emersed leaves floating, the peciole to emersed leaves ereet, petiolate, 10-45 em long, with a 30 em long, with a sheathing base to 10em long, the sheathing base to 5-10 em long, the blade linear- blade sagittate, 1-4 em long, 0.5-5 em wide, pellueid laneeolate, 5-15 em long, 0.2-2.3 em wide, peIlue~d markings absent. Infloreseenee raeemose, floating, markings absent. Infloreseenee raeemose, ereet, rarely rarely ereet, 1-20 em long, with 1-5 whorls, 3 flowers floating, 20-40 em long, with 2-10 whorls with 3 tlowers eaeh, without vegetative proliferations. Braets linear- eaeh, without vegetative proliferations. Braets laneeolate, free, delieate, 0.3-0.5 em longo Flowers laneeolate, united at base, delieate to eoarse, 0.5-2.5 em imperfeet; sepals ereet, 0.5-1 em long, 0.5 em wide; longoFlowers imperfeet; male fiowers with spreading petals clawed, 0.5-1 em long, 0.6 em wide; male flowers pedieels, 2-4 em long, sepals ereet, I em long, 0.5 em with sterile earpels, stamens 6, 0.3 em long; female wide; petals elawed, 2 em long, I em wide; stamens flowers with a ring of sterile stamens, earpels numerous. 9-12,0.5 em long, sterile earpels preseni; fi=!::..:~___ '. ; ':E1C"r:'Jlate,keeled, without glands, the margins with ereet pedieels, spreading and enlarged in fruit, eehinate, 0.2 em long, the beak lateral, ereet. 1.5-2 em long, appressed in fiower ano tTlilLl.: "' o;"monname: "lagartixa", "largatissa", "eorazón long, 1-2 em wide, petals clawed, 1.5-3 em long, 0.5 em de agua" (Pott & Pott 2000). wide, without sterile stamens, earpels IE":,,:~::, ~!),=cimens examined: BRAZIL: GOIÁS:Estrada oblaneeolate, keeled, without glands, 0.1 em long, the Araguapaz-Aruanã, a II Km de Araguapaz, 13-X-1997 beak lateral, horizontal. (tl., fr.), CP. Bove et a/o 281 (R, SPF); 13-X-1997 Common name: "lagartixa" (Pott & Pott 2000). (fl., fr.), CP. Bove et a/o 282 (R); Estrada Jussara- Speeimens examined: BRAZIL: GalÁs: Estrada .á.ragarças, a 100 km de Jussara, 25-V-1997 (fl.), CP. Jussara-Britânia, a 62 km de Jussara, eórrego Píndaíba, - - , Bove et a/o 136, fl. (R); 25-V-1997 (fl.), CP. Bove 14-XI-1999 (fl.,.r.) C lJGVCcr aJ, _"_ : - ::' ___ ! '(I (!{I; 26-V-1997 (fl.), CP. Bove et aI. 187 Jussara-Aragarças, a 100 km de Jussara, 25-V-1997 (R); 26-V-1997 (fi.), CP Bove et aI. 189 (R); (fi.), CP. Bove et aI. 143 (R); 25-V-IY4! (ti T.- Bove et aI. 144 (R); 25-V-1997 (fi.), CP. Bove et aI. Estrada Jussara-Aragarças, a 97 km de Jussara, 145 (R); 25-V-1997, c.P. B!:"~_: .:.'. _ ' ." , '- \.1-1999 25-V-1997 (fl.), CP. Bove et aI. 147 (R); 25-V-199. (fl., fr.), CP. Bove et aI. 513 (R); Estrada Jussara- (fi.), CP. Bove et aI. 148 (R); 25-V-1997 {TII ( ~ '-~. !- 1l}l}1)(tl., fr.), Bove et aI. 149 (R); 26-V-1997 (fi., fr.), CP. Bove CP. Bove et aI. 561 (R, SPF); Estrada Jussara- et aI. 162 (R); 26-V-1997 tIL; I. r t''''' ~-v-Eiij7 (tl.. fr.). (R); 26-V-1997 (fi., fr.), CP. Bove et aI. 164 (R); CP. Bove et aI. 200 (R, SPF); Estrada Jussara- 26-V-1997 (fi.), c.P. Bove C! c;;. :::. ; "'.: . C~ ~ liL), c.P. Bove et aI. 236 (R, SPF); Estrada Jussara. 12-XI-1999 (fi.), CP. Bove et aI. 536 (R). MATO Aragarças, a IIl km de JU55~r::.. !: :~.: ::-'~ ~ '7 . n,,~. "';nga-Canarana km 151, c.P. Bove et a/o526 (R); Estrada Jussara-Britânia (via 12-11-1993(fl., fr.), CP. Bove et aI. 95 (R). Jacilândia), a42,2km deJ:.;=~ ~~_ Revista Brasil. Bot., Y.27, n.3, p.439-452,jul.-set. 2004 445

Bove et aI. 560 (R); Estrada Caiapônia-Iporã, a 54 km Plants to 50 em ta11,stoloniferous. Floating leaves do trevo, 19-XI-99 (fl., fr.), c.P. Bove et aI. 670 (R. 7-20 em long, 2-6 em wide, with an ovate-orbieular SPF). MATOGROSSO:Paranatinga, 39 km ao sul, blade, petiolate, with a sheathing base 5em longo 9-Il-1993 (fl., fr.), c.P. Bove et ai. 89 (R). Infloreseenees with 1-5 flowers, seape 5-10 em longo Habitat: emergent plant, growing in sti11or running Braets elliptie, 1-2 em long, 0.5 em wide. Sepals with water 50-100 em deep. A very eommon speeies in this midvein ineonspieuous and hialine margins, 3 em long, reglOn. 1 em wide; petals reflexed, paie ye110wto white with a Distribution: from southern Costa Rica to Argentina. ye110wbase, 2.5 em long, 3 em wide; stamens 20-30 in In Brazil in the states ofBahia, Distrito Federal, Mato 2 series or more, 1 em long, staminodes numerous; Grosso, Mato Grosso do Sul, Minas Gerais, Pará, earpels 7, 1.5 em longoFruits not observed. Paraná, Piauí, Rio de Janeiro, Santa Catarina and São Common name: "lagartixa", "lagartissa", "amapola- Paulo (Haynes &.Holm-Nielsen 1994,Pott & Pott 2000). de-água", "water poppy" (pott & Pott 2000). Specimens examined: BRAZIL: MATOGROSSO: 7. (Willd.) Buehenau, Index Estrada Mozarlândia-Nova Crixás km 18, 13-X-1997 Crit. Butom.Alism. Juneag. p. 9. 1868. == (fi.), C.P. Bove et aI. 276 (R, SPF); Estrada nymphoides Willd., Sp. pl. 4(2):821. 1806. Type: Mozarlândia-NovaCrixása 18,6km do trevo, 15-XI-1999 : s. loe., Humboldt & Bonpland s.n. (fl.), c.P. Bove et aI. 606 (R. SPF). (holotype B-W). Observations: flowers c10sedearly in the moming, Figure 4A-C. opening around 10:00 amo

\ '.

/ \\\ \ ~:&t) , I ../-:-.. \ \ .' \ \ r,; I 10mm, :.J;...h l \, '., I . / \. \ J. " '_, i -" \ ~ ( B

\ \ " " " I ;i\i I I I

'(.J . " \'; '1- 1:; F. , \ 11,l., V.i; I'.f

.1" I

/ t .""."l -1cml W t Seml seml f' !D d;E

Figure 3. Species of Sagittaria from the uppcr and middlcAraguaia basin. A-S. S. guayanensis subsp. guayanensis. A. Habit; B. Male flower. C-E. S. rhombifolia. C. Habit; O-E. Leaves (A-B: Bove el aI. 200, C-O: Bove elal. 148, E: Bove ela/. 670). 446 S. Koehler & c.P. Bove: Alismatales ITomthe Araguaia river, Brazil

10mm

4em Sem

10mm

10mm

10mm . \

- ~ 8 j

Figure 4. Species of Alismataceae and Najadaceae ITomthe upper and middle Araguaia basin. A-C. Hydrocleys nymphoides. A. Habit; B. Flower; C. Calix. O-E Hydrocleys parviflora. D. Habit; E. Fruit; E. Calix. G-H. Limnocharis laforestii. G. Habit; H. Fruit. I-I. Najas microcarpa. I. Habit; J. . (A-C: Bove et aI. 276, D-F: Bove et ai. 201, G-H: Boveet aI. 618, I-J: Bove etal. 260).

... Revista Brasil. Bot., V.27, n.3, p.439-452,jul.-set. 2004 447

Habitat: plants with floating leaves, growing in still 0.5-1.5 em long, 0.3-1 em wide; pedieels I em long, water 50-100 em deep. Sporadie. I em wide. Sepals ovate, Iem long, 0.7 em wide; petals Distribution:tropical and subtropicalNorthAmerica, yellow, ovate to orbieular, 1.5 em long, 0.8 em wide; Central Ameriea, and South Ameriea. In Brazil in the stamens 15-20, 0.6 em long, staminodes numerous; states of Bahia, Ceará, Mato Grosso, Mato Grosso do earpels 20-30, 0.4 em long. Fruits 0.1 em long; seeds Sul, Pará, Paraíba, Pernambueo, Piauí, Rio Grande do numerous, 0.1 em long. Norte, Rio de Janeiro and Santa Catarina (Haynes & Common name: "eamalote" (Pott & Pott 2000). Holm-Nielsen 1992, Pott & Pott 2000). Specimens examined: BRAZIL: GoIÁs: Estrada Britânia-Aruanã, a 5 km de Jussara, 27-V-1997 (fl., fr.), 8. Hydrocleys parvifIora Seub. in Mart. & Eiehler, FI. c.P. Bove et ai. 205 (R). MATOGROSSO:Estrada Água bras. 3(1):117.1847. Type: BRAZIL: s.loe., Martius Boa-Cocalinho,a 144km daGO-I64, 12-X-1997(fl., fr.), s.n. (Ieetotype M, fide Haynes & Holm-Nielsen 1992). c.P. Bove et ai. 268 (R, SPF). Figure 4D-F. Observations: the speeimens examined presented the peduncles shorter than the petioles and the pedicels Plants to 100em tall, stoloniferous. FIoating leaves not eonspieuously winged. The staminodes were with an elliptie blade, 5 em long, I em wide, petiole up numerous, like in Limnocharis fIava (L.) Bueh. The to 100 em long with a sheathing base 10 em long. number of staminodes, however, is not eonsidered a Infloreseenees with 2-10 flowers, seape 100 em long. diagnostie eharaeter aeeording to the last taxonomie Braets laneeolate, 2 em long, I em wide. Sepals with treatment available for the (Haynes & Holm- eonspicuous midvein, 2 em long, I em wide; peta1swhite, Nielsen 1992). 1.5 em long, I em wide; stamens 5 in one whod, 0.3 em Habitat: emergent plant, growing in sti11water long, staminodes 3; earpels 3, 0.4 em longoFruits 1.2 em 50-100 em deep. Sporadic. long, beak 0.1 em long; seeds numerous, glandular Distribuição: Mexieo to Bolivia, Argentina and pubeseent, I mm long. Brazil, in the states of Bahia, Goiás, Maranhão, Mato Common name: "lagartixa" (Pott & Pott 2000). Grosso, Mato Grosso do Sul, Paraíba, and Piauí (Haynes Speeimens examined: BRAZIL: GOIÁS:Estrada & Holm-Nielsen 1992, Pott & Pott 2000). Jussara-Britânia, a 54 km de Jussara, 28-V-1997 (fl.), c.P. Bove et ai. 201 (R, SPF). Hydroeharitaeeae Juss. Habitat: plants with floating leaves, growing in still water 50-100 em deep. Rare in the Araguaia river region. Herbaeeous, annual or perennial, glabrous, not Distribution:southernMexieoto CostaRica,northern laetiferous. Stems ereet, rhizomatous or stoloniferous, Colombia,Venezuelaand Boliviato east-centralBrazil, in elongated or eontraeted. Leaves submersed, floating or the states ofGoiás, Mato Grosso do Sul, Minas Gerais and partially emersed, basal, altemate or whoded, sessile or Rio de Janeiro (Haynes & Holm-Nielsen 1992). petiolate, margins entire or serrulate, the blade linear to eliptie-Ianeeolate, 1- or pluriveined, without pellucid markings. Inflorescenees eomplex with I-many flowers 9. Limnocharis la/orestÜ Griseb., Bonplandia 6(I): 11. 1858. Type: PANAMA: S. loe. Duchassaing et ai. s.n. or flowers solitary, with subtending spathe, eomposed of 1-2 free or united braets. Flowers epigynous, perfeet (leetotype GOET, fide Novelo 1987; isoleetotype GOET). or imperfeet, perianth aetinomorphie, of 6 free segments in 2 series: sepals 3, green, persistent; petals 3, larger Figure 4G-H. than sepals, white oryellow, delieate, deciduous; stamens Plants to 50 em tall, rhizomatous. Leaves ereet, 3, 6 or 9, free; earpels 3, fused, ovary I-Ioeuled, petiolate, with an elliptie to ovate blade, 15-25em long, prolongated in a free hypanthium, numerous ovules of 1-2 em wide with a sheathing base 5 em long. parietal or laminarplaeentation, the styles flattened. Fruit Infloreseenees with up to 5 flowers. Bracts elliptie-linear, a eapsule with numerous fusiform seeds.

Key to the species of Hydroeharitaeeae of the upper and middle Araguaia river region

I. Stems elongated; leaves sessile; flowers white 2. Flowers perfeet; stamens 3 10. Apalanthe granatensis 2. Flowers imperfeet; stamens 9 11. Egeria heterostemon I. Stems eontraeted; leaves petiolate; flowers yellow 12. Ottelia brasi/iensis 448 S. Koehler & c.P. Bove: Alismatales ITomthe Araguaia river, Brazil

10.Apalanthe granatensis (BonpI.) Planeh., Ann. Mag. Plants submersed or partially emersed. Stems Nat. Hist., Sér. 2 (1):87. 1848. == Elodea granatensis elongated, terete, irregularly branehed. Prophylls paired, Bonpl. in Humbolt & Bonpland, PI.aequinoct 2(16):150, deltate; leaves opposite or whorled, sometimes altemate pU28. 1813. Type: COLOMBIA: "in aquis Novas near the base, sessile, 4-10 in eaeh node, frequently Granatea, prope urbem Guaduas", "entre Honda et reeurved, linear, gradually attenuated to an aeute apex, Cune", elev. 1,150 m, Humboldt & Bonpland s.n. 0.6-0.8 em long, margins and apex bearing unieellular, (holotype, plate in Humbolt & Bonpland, PI. aequinoet thiek-walled priekle-hairs. Intravaginal squamules 2 (16), pl. 128. 1813). usually 2 in eaeh leafaxil, ovoid to orbieular, 0.1-0.2 mm Figure 5A-B. longoSpathe sessile, axillary, ovoid, 1.0 em long, with 2 apieal teeth. Male flowers: 2 in eaeh spathe, rarely more, Plants submersed or partially emersed. Stems pedieels up to 4.0 em long, emersed; sepals ovate and elongated, terete, irregularly branehed. Prophylls paired boat-shaped, 0.2 em long, 0.1 em wide; petals at the base of branehes, deltate; leaves altemate or suborbicular, white, delieate, 0.2-0.4 em long, 0.2-0.3 mm whorled, sessile, 3-7 in eaeh node, margins serrulate, wide; stamens 9, in altemate whorls of 3; outer and I-veined, the blade linear and gradually attenuated at median whorls 0.1 em long; filaments glabrous; stamens the apex, 1-1.5 em longoSubtending spathe eonsisting in the outer whorl usually smaller than those of median oftwo braets, sessile, axillary, um-shaped, 0.5 em long, whorl, although similar in formo Inner whorl: 0.15 em 0.1 em wide. Flowers solitary, perfeet, sessile, emersed; long, filaments stronglypilose distally; nectary 1,central, sepals ovate, reflexed, 0.2 em long, 0.1em wide; petals 3-1obed,0.2 mm wide. Female flower: I in eaeh spathe, obovate, white, delieate, 0.3 em long, 0.2 mm wide; sessile, emersed; sepals ovate and boat-shaped, 0.2 em stamens 3, 0.2 em long; styles 3, flattened, 2- or long, 0.1 em wide; petals suborbieular, white, delieate, 3-divided, with neetaries at the base, 0.2 em long; ovary 0.3 em long, 0.2 mm wide; staminodes 3, strongly 0.5 em long, attenuate above in an elongated free papillose distally; 0.15 em long, styles 3, two-thirds hypanthium to 5em longoCapsule ellipsoidal, irregularly divided along length; ovary up to 0.3 em long, ovoid, dehiseent, 0.5 em long; seeds up to 30, ea. I mm long, attenuate above in an elongated free hypanthium to eovered with hairs. 0.35 em longo30-40 ovules with parietal plaeentation. Common name: "lodinho branco" (Pott& Pott 2000). Fruit unknown. Speeimens examined: BRAZIL: GalÃs: Estrada Common name: unknown Aruanã-Goiás 8,8 km de Aruanã, 29-V-1997 (fi.), CP. Speeimens exarnined: BRAZIL: GalÃs: Estrada Bove et ai. 224 (R. RB); Estrada GO-334, a 47,8 km da Aruanã-Goiás, 19 km de Aruanã, 29-V-1997 (fl.), c.P. GO-164, 16-XI-1999 (fi.), c.P. Bove et ai. 632 (R); Bove et ai. 225 (CPAP, HUEFS, MBM, MO, R. RB); Brasilândia, Tupiratins, Rio Feio, 20-III-1976 (fl.), MATOGROSSO:Estrada Água Boa-Coealinho, a 148 km G Hatschbach & R. Kummrov 38497 (MBM). MATO de Água Boa, 12-X-1997 (fl.), c.P. Bove et ai. 273a GROSSO.Estrada Água Boa-Cocalinho, a 148km de Água (R. RB). Boa, 12-X-1997 (fi., fr.), CP. Bove et ai. 273b (R. RB); Habitat: submersed plant, growing in still or running Estrada Água Boa-Rio das Mortes, 20-IT-1993,CP. Bove water up to 50 em deep along stream margins and in et ai. 114 (R. CPAP); Córrego do Rosário, Forquilha do swampy environments. Rare. Rio, III-1918 (fr.), J.G Kuhlmann 1620 (R). Oistribution: Median Araguaia river in the states of Habitat: submersed plant, growing in still orrunning Mato Grosso and Goiás (KoeWer & Bove 200 I). water up to 50 em deep. Sporadie. Oistribution: tropical SouthAmeriea, in Brazil in the 12. Ottelia brasi/iensis (Planeh.) Walp., Ann. Bot. Syst. states of Amazonas, Bahia, Goiás, Mato Grosso, Mato 3(3):510. 1852. == Damasonium brasi/iensis Planeh., Grosso do Sul, Maranhão, Minas Gerais, Pará, Ano. Sei. Nat. Bot. (Paris) 11:81, t.l4. 1849. Type: Pernambueo, Piauí, Rio de Janeiro, Roraima, São Paulo BRAZIL: MINASGERAIS,Gardner 5191 (holotype K). (Cook 1985). Figure 5J-K. 11.Egeria heterostemon S. KoeWer& C.P.Bove, Novon Plants submersed. Stems eontraeted, rhizomatous. 11:63. 2001. Type: BRAZIL: GalÃs, Estrada Aruanã- Juvenile leaves linear, sessile, ephemerous; adult leaves Goiânia, 19 km from Aruanã, c.P. Bove et ai. 225 petiolate, up to 50 em, with a sheathing base, blade (holotype RB; isotypes CPAP, HUEFS, MBM, MO, R). membranaeeous, elliptie-laneeolate, margins entire or Figure 5C-I. undulate, 10-40em long, 3-5 em wide. Subtending spathe c

Revista Brasil. Bot., Y.27, n.3, p.439-452,jul.-set. 2004 449

i1

/0~ /I l-~. I ,i 'fI I i \ i§ I I r ! i t I f. .. f

~r' i 1mm f 1rnm i 'tI, I I . F ~G ,-.,.1'1

E --- O

Figure 5. Species of Hydrocharitaceae ITomthe upper and middle Araguaia basin. A-H. Apalanthe granatensis. A. Habit; B. Leaf. C-I. Egeria heterostemon. C. Habit; D. Male flower; E. Female flower; F. Stamen of outer whorl; G Stamen ofinner whorl; H. Style; I. Staminode. J-K. Ottelia brasiliensis. J. Habit. K. Flower. (A-B: Bove et ai. J14, C-I: Bove et ai. 225, reprodution of original publication in Novon, J-K: Bove etaI. J94). ..

450 S. Koehler & c.P. Bove: Alismatales ITomthe Araguaia river, Brazil eonsisting of two braets, emersed, membranaeeous, conspicuous, multicellular serrulate margins, 0.1-0.2 em um-shaped, 5 em long, 1 em wide. Flowers solitary, long, and eiliated sheaths bearing microseopie perfeet, pedicels 2 em long; sepals obovate-laneeolate, projeetions. Seeds fusiform to obovate, 0.1-0.2 cm long, with delieate margins, 1-2 em long, 0.5 em wide; petals areolate with square to reetangular omamentatiü .' ;-u'. ilte-orbieular, yellow, delieate, margins undulate, Common name: "lodo", "najad" (Pott & Pott 2000). 2 em long, 2 em wide; stamens 6, lem long; styles 3, Specimens examined: BRAZIL: GOIÁs:E::;i.raUH fiattened, linear,2- or 3-divided, 3 em long, with nectaries Jussara-Aragarças, a 3 km de Jussara, II-X1-1999 at the base, ea. 0.2 em long; ovary 0.5 em long, anthers (fi., fr.), c.P. Bove et ai. 496 (R, SPF). MATOGROS",,-'. elongated with a mueronate eonneetive. Fruits not Estrada Água Boa-Cocalinho, a 59 km de Água-Boa, observed. II-X-1997 (fi., fr.), c.P. Bove et ai. 260 (R, SPF). Speeimens examined: BRAZ1L: GOIÁs:Estrada Habitat: free or attaehed on the substrate, Jussara-Aragarças, a 100km de Jussara, 27-V-1997 (fi.), submersed, growing in a small braekish pond as a c.p Bove et aI. 191 (R, SPF); 9-X-1997 (fi., fr.), c.P. dominant species in association with Cabomha fi1rr-n'(I Bove et ai. 239 (R, SPF); Estrada Jussara-Aragarças, Sehultes & Schultes f. Sometimes also Captilf<;;J a 97 km de Jussara, 27-V-1997 (fi.), c.P. Bove et ai. between rocks of rivers. Sporadie. 194 (R); ll-XI-1999 (fi.), c.P. Bove et ai. 503 (R, SPF); Oistribution: South Ameriea in Freneh Guiana, Estrada Jussara-Britânia, via Jaeilândia, a 42 km de Venezuela, Colombia, Paraguay and Brazil, in the state~ Jussara, 12-XI-1999 (fi.), c.P. Bove et ai. 556 (R); ofAmazonas, Maranhão, Mato Grosso and Mato Grosso Estrada Jussara-Britânia, via Jaeilândia, a 59 km de do Sul (Lowden 1986, Pott & Pott 2000). . Jussara, 12-X1-1999 (tl.), c.p Bove et ai. 551 (R). Albeit its biological importance, the diversity of Habitat: submersed plant growing in running water tropical aquatie eeosystems remai!i~ , 50-100 em deep. Sporadie. (Crow 1993). The elaboration of ehecklists followed by Oistribution: southeastem Brazil, in the states of taxonomic studies of aquaticplant",'_.. .CC" ~ ~ \1 ",1;;(;erais, Mato Grosso, Mato Grosso do Sul, and need for Brazilian aquatic eeosystems today, especially Paraná. in regions that are poorly studied, such as the northem and central regions. Unfortunately Brazilian aquatie Najadaeeae Juss. eeosystems have been continuously destroyed or altered by the deviation of natural water eourses, by local direct Herbaeeous, submersed, glabrous, not laetiferous. and indireet pollution of the water as wfll JS r'.' !'-:.- Stems elongated with short to long intemodes, irregularly branched, smooth to spinulose, easily fragmented. destruetion of the Cerrado vegetation and Riparian Leaves altemate to subopposite or apparently whorled, forests, as observed during the developmi>I'tr.f:-~,_ ~- sessile, sheathed, blade linear to laneeolate, I-veined, fiattened to reeurved, margins with inconspicuous to Acknowledgments - We are grateful to Wilson Costa for conspicuous, unieellular to multieellular serrulate suggesting the exploration ofthe interesting and stin P0:::"t. known aquatic flora of the Araguaia basin; to André Gii, projeetions. Flowers hypogynous, imperfeet, Claudio Moreira, Jane Morrey-Jones and Rcn~t ' :_,-,,-,,-- inconspicuous, solitary or not, perianth absent. Male their help in the field and to Eduardo Hicküiçt iOl ine fiowers shortly pedunculate, subtended by an involueral illustrations; to thejournal Novon (Missouri Botanicd G~~,::, braet, bearing 1 stamen with a sessile anther; female Press) for permission to reproduce the illustratiüiiS ür E15""lU flowers sessile with involueral bract rarely present heterostemon; and to the curators ofthe herbaria R, BHCB, I-earpelate, I-loeuled, 1ovule, stigma 3. Fruit a nutlet. CPAP, HUEFS and MBM forsending material forcomparativc Seeds elliptie, ovate or fusiform, ridged, testa pitted with studies. This manuiscript was greatly improved by the many aureolae of distinet shapes. comments of Fabio de Barros, Renato Mello-Silva, Robert Haynes, Volker Bittrich, Wilson Costa and an anonymous reviewer. Material was collected with authorization 13. Najas microcarpa K. Schum. in Mart., Eiehler & 02001.004264/98-16-ACITomlbama. Urban, FI. bras. 3(3):727. 1894. Type: PARAGUAY: Rio Paraguay, Weddell 3289 (leetotype P). Figure 41-J. References

Stems elongated with short intemodes, smooth, ABREU, L.C. 1981. Flora fanerogâmica da reserva do Parque leaves coneentrated in the terminal region. Leaves Estadual das Fontes do Ipiranga (São Paulo, Brasil). subopposite or apparently whorled, reeurved with 102-Alismataceae. Hoehnea 9:119-120. Revista Brasil. Bo1., V.27, n.3, p.439-452,jul.-se1. 2004 451

ALBUQUERQUE, B.W.P. 1981. Plantas forrageiras da IRGANG,B.E. & GASTAL,C.V.S. 1996.MacrófitasAquáticas Amazônia. 1. Aquáticas flutuantes e livres. Acta da Planície Costeira do RS. Universidade Federal do Rio Amazonica 11:457-471. Grande do Sul, Porto Alegre. ALMEIDA-REGO, S.C. 1988.Alismataceae Ventenantdo Rio IRGANG, B.E., PEDRALLI, o. & WAECHTER, lL. 1984. Grande do Sul. Dissertação de mestrado, Universidade Macrófitos aquáticos da Estação Ecológica do Taim, Federal do Rio Grande do Sul, Porto Alegre. Rio Grande do Sul, Brasil. Rossléria 6:395-404. BERG, M.E.Y.D. 1984. Formas atuais de aproveitamento das JOYCE, lC. 1990. Pratical uses of aquatic weeds. In Aquatic espécies nativas e exóticas do Pantanal mato-grossense. weeds: the ecology and management of nuisance aquatic ln Anais do 10Simpósio de Recursos Naturais e Sócio- vegetation (A.H. Pieterse & K.J. Murphy, eds.). Oxford econômicos do Pantanal. Embrapa-DDT-CPAP, University Press, Oxford, p.274-291. Corumbá, p.131-136. JUDD,W.S.,CAMPBELL,C.S.,KELLOGG,EA. & STEVENS, BOVE,c.P., GIL,AS.B., MORElRA,C.B.,ANJOS,REB. 2003. P.F. 1999. Plant systematics. A phylogenetic approach. Hidrófitas fanerogâmicas de ecossistemas aquáticos Sinauer Associates, Sunderland. temporários da planície costeira do estado do Rio de KOEHLER,S.&BOVE,C.P.2001.Hydrocharitaceaefrom Janeiro, Brasil. Acta Botanica Brasilica 17:119-135. Central Brazil: a new species of Egeria and a note on COOK, C.D.K. 1985. A revision of the genus Apalanthe Apalanthe granatensis. Novon 11:63-66. (Hydrocharitaceae). Aquatic Botany 21: 157-164. LES, D.H. & HAYNES, RR. 1995. Systematics ofthe subclass COOK, C.D.K. 1996.Water plants ofthe world. SPBAcademic Alismatidae: a synthesis of approaches. ln Publishing, Amsterdam. : systematics and evolution (P.J. COOK, C.D.K. & URMI-KONIG, K. I984a. Arevision ofthe Rudall, P.J. Cribb, D.F. Cutter & C,J. Humphries, eds.). genus Egeria (Hydrocharitaceae). Aquatic Botany Royal Botanical Gardens, Kew, p.353-377. 19:73-96. LOWDEN, R.M. 1986. of the genus Najas L. COOK, C.D.K. & URMI-KONIG, K. 1984b.Arevision ofthe (Najadaceae) in the Neotropics. Aquatic Botany genus Ottelia (Hydrocharitaceae). 2. The species of 24:147-184. Eurasia, Australasia and America. Aquatic Botany NIERING, WA 1985. Wetlands. TheAudubon Society, New 20:131-177. York. CROW, G.E. 1993. Species diversity in aquatic angiosperms: NOVELO,A 1987.Lectotipificación deLimnocharis la/orestii latitudinal pattems. Aquatic Botany 44:229-258. Duchass. ex Grieseb., (Limnocharitaceae). Boletín de Ia ESTEVES, F.A. 1988. Fundamentos de Limnologia. Editora Sociedad Botánica de México 47:92-93. Interciência, Finep, Rio de Janeiro. PALOMBO, C.R. & PEREIRA, M.D.B. 1992.Monitoramento ESTEVES, EA. & CAMARGO, AEM. 1986. Sobre o papel de plantas aquáticas por satélite. Ambiente 6:49-53. das macrófitas aquáticas na estocagem e ciclagem dos PEDERSEN, T.M. & KLEIN, R.M. 1976.Limnocaritáceas .In nutrientes. Acta Limnologica Brasiliensia 1:273-298. Flora Ilustrada Catarinense (R. Reitz, ed.). Herbario FARIA,AD. 1998. O gêneroEleocharis R. Br. (Cyperaceae) Barbosa Rodrigues, ltajaí, fase. LIMN, p.1-9. no Estado de São Paulo. Dissertação de mestrado, PEDRALLI, o. 1981. A família Mayacaceae Kunth no Rio Universidade Estadual de Campinas, Campinas. Grande do Sul, Brasil. Iheringia, série Botânica 28:47-54. GUIMARÃES, E.S. 1999. Alismataceae da região sul do Pantanal Mato-grossense. Dissertação de mestrado, PEDRALLI, 0., STEHMANN, J.R., TEIXEIRA, M.C., Universidade de São Paulo, São Paulo. OLIVEIRA,V.L.&MEYER, S.T.1993a.Levantamentoda HAYNES, R.R. & HOLM-NIELSEN, L.B. 1985. A generic vegetação aquática (macrófitos) na área da EPDA-Peti, treatment of Alismatidae in the neotropics with special Santa Bárbara, MG Iheringia, série Botânica 43: 15-28. referencetoBrazil.ActaAmazonica 15(supl. 1-2):153-193. PEDRALLI, G, MEYER, S'T.' TEIXEIRA, M.C., OLIVEIRA, HAYNES, R.R. & HOLM-NIELSEN, L.B. 1992. The Y.L. & STEHMANN, J.R. 1993b. Levantamento dos Limnocharitaceae. Flora Neotropica Monographs macrófitos aquáticos e da mata ciliar do Reservatório de 56:1-32. Volta Grande, Minas Gerais, Brasil. Iheringia, série HAYNES, R.R. & HOLM-NIELSEN, L.B. 1994. The Botánica43:29-40. Alismataceae. Flora Neotropica Monographs 64: 1-112. POTT, Y.J. 1993.Afamília Lemnaceae S. F. Gray no Pantanal HENRIQUES, R.P.B., ARAÚJO, D.S.D., ESTEVES. EA & (Mato Grosso e Mato Grosso do Sul), Brasil. Dissertação FRANCO,AC. 1988.Análisepreliminardas comunidades de mestrado, Universidade Federal do Paraná, Curitiba. de macrófitas aquáticas da lagoa de Cabiúnas, Rio de POTT, V,J. & CERVI, A.C. 1999. A família Lemnaceae no Janeiro, Brasil. Acta Limnologica Brasiliensia 3:783-802. Pantanal (Mato Grosso e Mato Grosso do Sul) Brasil. HOEHNE, F.C. 1948. Plantas Aquáticas. Secretaria da Revista Brasileira de Botânica 22: 153-174. Agricultura do Estado de São Paulo, São Paulo. POTT, Y.J.& POTT,AI997. Checklistdasmacrófitasaquáticas IBGE. 1989. Geografia do Brasil- região Centro-Oeste. v.l. do Pantanal, Brasil.Acta Botanica Brasilica 11:215-227. Fundação Instituto Brasileiro de Geografia e Estatística, POTT, V,J. & POTT, A 2000. Plantas Aquáticas do Pantanal. Rio de Janeiro. EMBRAPA, Brasilia. «/ .

452 S. Koehler & c.P. Bove: Alismatales ITomthe Araguaia river, Brazil

POTI, V.l, BUENO, N.C., PEREIRA, R.AC., SALIS, S.M. & RATAJ, K. 1972. Revision of the genus Sagittaria. Part lI. VIElRA, N.L. 1989. Distribuição de macrófitas aquáticas The species ofWest Indies, Central and SouthAmerica. numa lagoana FazendaNhumirim, Nhecolândia, Pantanal, Annotationes Zoologicae et Botanicae 78:1-61. MS. Acta Botanica Brasilica, suplemento 3:135-168. RATAJ, K. 1975. Revizion [sic] ofthe genus Echil1odorus POTI, V.J.,BUENO, N.C. & SILVA,M.P. 1992.Levantamento Rich.Akvárium-Terarium:1-155. florístico e fitossociológico de macrófitas aquáticas em RATAJ, K. 1978. Alismataceae ofBrazil.ActaAmazonica 8 lagoas da Fazenda Leque, Pantanal, MS. In Anais do (supl.l):1-154. VII Congresso da Sociedade Botânica de São Paulo. SCHESSL, M. 1997. Flora und Vegetation des nõrdlichen Sociedade Botânica de São Paulo, Campinas, p.91-99. Pantanal von Mato Grosso, Brazilien. Floristiche PRADO,AL., HECKMAN, c.w. & MARTINS,R.F. 1994.The Zusammensetzung, Pflanzengesellschaften und seasonal sucession of biotic communities in wetlands Vegetationsdynamic saisonal und permanent of tropical wet-and-dry climate zone. lI. The Aquatic überfluteter Standorte eines tropischen Macrophyte Vegetation in the Pantanal ofMato Grosso, Brasil. 1994. Internationale Revue der Gesamten Sedimentationbeckens. Martina Galunder- Verlag, Wiel. Hydrobiologie 79:569-589. TUNDISI, lG. & BARBOSA, FAR. 1995. Conservation of RATAJ, K. 1969. Echinodorus longipetalus Mich. and other aquatic ecossystems: present status and perspectives. species with reticulate markings in the blades ITom Central and South America. Folia Geobotanica & 111Limnology in Brazil (J.G. Tundisi, C.E.M. Bicudo & Phytotaxonomica 4:435-442. T. Matsumura, eds.). ABC/SBL, Rio de Janeiro, RATAJ, K. 1971. The taxonomy of Echinodorus palaefolius p.365-376. (Nees et Mart.) MacBr. (Alismataceae) and related WANDERLEY, M.G.L. 1989.Xyridaceae. 111Flora uo E"" i'-. species !TomMexico, Central and SouthAmerica. Preslia de Goiás. Coleção Rizzo (J.A. Rizzo, coord.). 43:10-61. Universidade Federal de Goiás, Goiânia, v.ll, p.I-81.