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A New Species of Lobelia () from Brazil Author(s): Ana Odete Santos Vieira and G. J. Shepherd Source: Novon, Vol. 8, No. 4 (Winter, 1998), pp. 457-460 Published by: Missouri Botanical Garden Press Stable URL: http://www.jstor.org/stable/3391874 . Accessed: 02/09/2014 11:04

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This content downloaded from 143.106.1.143 on Tue, 2 Sep 2014 11:04:47 AM All use subject to JSTOR Terms and Conditions A New Species of Lobelia (Campanulaceae) fromBrazil

Ana Odete Santos Vieira* and G. J. Shepherd Departamentode Botanica,Universidade Estadual de Campinas,CxP 6109, 13083-970, Campinas,Sio Paulo, Brazil. *Permanentaddress: Departamentode BiologiaAnimal e Vegetal, UniversidadeEstadual de Londrina,CxP 6001, 86051-990, Londrina,Parani, Brazil; E-mail: [email protected]

ABSTRACT.Lobelia brasiliensis,a new species of RESULTS AND DISCUSSION subsectionHaynaldianae F. E. Wimmer(of Lobelia L. sect. Rhynchopetalum),is described from Brazil. Lobelia brasiliensis A. O. S. Vieira& G. J. Shep- It is distinguishedfrom related Brazilian species by herd,sp. nov.TYPE: Brazil.Distrito Federal: its yellowishpuberulous abaxial leaf surfaceand the smallerdimensions of its floralstructures. This Brasiliaa Taguatinga,12 Sep. 1964, Prance& Silva 59034 (holotype,UB; isotypes,M, NY, species also has a differentflowering period and is RB, S, US). Figure 1. isolatedgeographically. Interspecies brasilienses subsection Haynaldianae F. subtus 14-29 The Lobelia was established by Linnae- E. Wimmer,foliis supra glabris, puberulis, cmlongis, 2.5-6 cmlatis; pedicello sigmoideo, puberulo, us (1753) in Species Plantarum. Lobelia is in- 12-35 mm;corolla extus puberula et intuspuberula vel cluded in the family Campanulaceae Jussieu tantumadest in parteinferiore, ca. 2-4 cmlonga; hypan- (Cronquist, 1981), subfamilyLobelioideae Bur- thiopuberulo; seminibus late alatis differt. nett(Burnett, 1835; Wimmer,1943), considered 1.5-4 m tall,with white latex. Stem terete, by some authorsto be the separate familyLob- fistulose,glabrous. Leaves narrowlyoblong or nar- eliaceae R. Brown (Dahlgren, 1980; Heywood, rowlyelliptic-lanceolate, 14-29 cm long,2.5-6 cm 1993; Hutchinson,1973). This genus is distin- wide; apex acuminate,base narrowlycuneate and guished by a dorsal slit that reaches the corolla decurrent,margin minutelyserrate or dentate, base and by the fruit,which is a capsule that chartaceous,adaxially glabrous, abaxially puberu- dehisces by twovalves. This genus is widespread lous withyellowish indument; secondary veins 14- in the tropics,with centers of diversity in tropical an of with the mid- Africa and Mexico. Lobelia L. is estimated to 26 pairs forming angle 450-60O rib. Inflorescencea terminalraceme, up to 1.5 m, containabout 450 species (Wimmer,1953, 1968) withsmaller secondary basal racemes,all puberu- and is representedin Brazil by two subgenera: lous on the rachis. Bractsdeflexed, lanceolate, 17 subg. Lobelia (6 species), delicate prostrateor mmlong, 3 mmwide, acute, margin entire and cil- erect herbs up to 1 m; and subg. Tupa (G. Don) iate, decurrent,and connateto pedicels, puberu- F. E. Wimmer(10 species), erect herbswith hol- lous. Pedicel terete,sigmoidal ascending, 12-35 low stems up to 4 m tall at flowering(Braga, mmlong, puberulous. Calyx with triangular sepals, 1956; Kanitz, 1878). 3-4 mm wide at the base and 15-17 mm long, During a study of Brazilian lobelias, a new acute, marginentire, puberulous. Dorsal corolla species was recognized in subgenus Tupa. This lobes 21-39 mmlong and 0.5-1.5 mmwide, ven- new taxon belongs to section Rhynchopetalum tral lobes 10 mmlong and 1.5-2.5 mmwide; pu- (Fresenius) Bentham,subsection Haynaldianae berulouson bothfaces or onlyon the lowerthird F. E. Wimmer The new (Mabberley,1974). spe- Stamens cies is described and illustratedhere. of the internalface, indumentyellowish. withfilaments 25 mmlong, puberulous; anthers 6- 8 mm cam- MATERIAL AND METHODS long, glabrous,grayish. Hypanthium panulate,3-5 mm long and 5-9 mmwide, puber- This studywas based on herbariummaterial bor- ulous, indumentyellowish. Capsule ovoid, 1/3-2/3 rowedfrom the herbariacited in the materialex- freefrom the hypanthium,10-12 mmlong, 20-25 aminedand on observationsof plantsin theirnat- mm wide; sepals 3-4 mm wide and 20-35 mm ural habitats. long; bract25 mm long,pedicel 20-25 mm long. NovoN 8: 457-460. 1998.

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Figure1. Lobelia brasiliensisA. O. S. Vieira& G. J. Shepherd.-A. Shootwith leaves. -B. Leaf withnervation. - C. Detail of marginof leaf. -D. Indumenton abaxial surface.-E. Inflorescence.-F. Flowerand bract.-G. Corolla open, internalface. -H. Fruit.(A-H Silva s.n., RB 162862.) -I. Seed (Heringeret al. 254).

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Seed lenticular,suborbicular, yellow and finelyre- es near riparianforests and "cerrados"(Brazilian ticulate,1.2 mmlong, 1.0 mmwide, with seed body savannas)or open spaces; 700-1175 m. 0.8 mm long and 0.3 mm wide, surroundedby a Flowering and fruiting. The majority of indi- broad (0.1-0.4 mm)wing. viduals flowerin spring (September-November), and the remainingBrazilian species flowerin sum- Etymology. The specificepithet is a reference meror winter. to Brazil,since thisspecies is endemicand occurs aroundthe capital,Brasilia. Paratypes. BRAZIL. Distrito Federal: Brasilia,Ir- & Taxonomicremarks. This species appearsto be win Soderstrom6119 (UB);ColHgio Agricola de Brasilia, Rio Parnafba,Mattos Filho & Heringer350 (RB); Col~gio close to Lobelia thapsoideaSchott (Schott, 1831), Agricola,Pires & Mattos9864 (UB); C6rregodo Zool6gico, whichoccurs predominantly in the stateof Rio de Lima 22 (UB); Zoobotinico,Sucre 483 (UB); C6rregoSa- Janeiro,but differsin its narrowlywinged seeds mambaia,Irwin et al. 8157 (UB); FundaBo Zoobotinica, and lack of yellowish indument.The broadly Pires et al. 9516 (F not seen, RB, UB); RECOR R.2, s. col. 609 RECOR et al. 204 seeds also showsimilarities to L. 1978, (UEC); R.2, Heringer winged organensis (UEC); RECOR R.7, Heringeret al. 254 (UEC); Brasilia Gardner,but this species has glabrous leaves Rio Torto,Irwin et al. 18065 (UB); Rodovia3, Allenet al. (Gardner, 1845). Scanning electron microscope 394 (RB); Universidadede Brasilia,Campo Olimpico La- (SEM) observationsshow that in thepresent species goa Paranoi, 15?46'S, 47051'W, Plowmann10000 (F not the seed coat has much thickercell walls, the seen, NY, MBM); Cerrado3 km da Rodoviairia,Silva s.n. 13223 4 thickestobserved in all of the Brazilianlobelias. (RB 162862); Sobradinho,Heringer (HB, UB); km VargemBonita, rodovia para Brasilia, Ratteret al. The yellowish indumentconcentrated on floral 4355 (E); 5 km S de Brasilia para Belo Horizonte,Rio structuresand the smallerdimensions of its leaves Gama, Irwin et al. 8529 (UB); Reserva Ecol6gica do and flowersare also distinctiveamong the Brazilian IBGE, PereiraNeto 55 (UEC); Final da Asa Norte,Rocha s.n. (FUEL 11115). species of this section. Distributionand habitat. Lobelia brasiliensisis Acknowledgments.The studyof this new taxon geographicallyisolated from the remainingspecies is a part of A. O. S. Vieira's MSc. dissertation at of the subsection.Its distributionarea is concen- UniversidadeEstadual de Campinas,partly spon- tratedin theDistrito Federal (Fig. 2), in moistplac- sored by a grantfrom CAPES (CoordenaCiode

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and Lobeliaceae. Aperfeigoamentode Pessoal de Nivel Superior). We Heywood,V. H. 1993. Campanulaceae 2nd ed. thank the herbaria mentioned for the loan of ma- Pp. 254-256 in: FloweringPlants of the World, OxfordUniv. Press, New York. terial, Maria Augusta Santos Vieira forthe illustra- Hutchinson,J. 1973. Campanulaceae and Lobeliaceae. tions, Volker Bittrichfor commentingon a draftof Pp. 586-594 in: The Familiesof FloweringPlants, 3rd this paper, P. Josafi C. de Siqueira SJ for verifying ed. ClarendonPress, Oxford. A. 1878. Lobeliaceae. In: C. F. P. von Martius, the Latin diagnosis, and Daniela Zappi for helping Kanitz, Flora Brasiliensis6(4): 130-187. Frid.Fleischer, Leip- to locate Burnett'sbook in the Library of the Royal zig. Botanic Gardens, Kew. Linnaeus, C. 1753. Lobelia. Pp. 929-933 in: Species Plantarum,vol. 2. The Ray Society,London. LiteratureCited Mabberley,D. J. 1974. The pachycaulLobelias of Africa and St. Helena. Kew Bull. 29: 535-584. Braga,R. E. 1956. Lobelias do Brasil-Contribuigo para o seu estudo.Arquivos de Biologiae Tecnologia11: 21- Schott,1831. V. II. Lobelia. Pp. 102 T. 167 in J. B. E. 94. Pohl, Plantarum Brasiliae icones et descriptiones, Burnett,G. T. 1835. Campanulaceae. Pp. 941-942 in: Wien. Outlinesof Botany.Henry Renshaw, London. Wimmer,F. E. 1943. Campanulaceae-.V. I. 1-260 in A. Das Pflanzenreich. 276b. Cronquist,A. 1981. Campanulaceae.Pp. 300-303 in: An Pp. Engler, IV. IntegratedSystem of Classificationof FloweringPlants. AkademieVerlag, Berlin. ColumbiaUniv. Press, New York. - . 1953. Campanulaceae-Lobelioideae.V. II. Pp. Dahlgren,R. M. T. 1980. Campanulaceaeand Lobeliaceae 261-813 in A. Engler,Das Pflanzenreich.IV. 276b. in: A revised systemof classificationof the angio- AkademieVerlag, Berlin. sperms.J. Linn. Soc., Bot. 80: 91-124. -. 1968. Campanulaceae-Lobelioideae. Supple- Gardner,G. 1845. Contributionstowards a floraof Brazil. mentum.Pp. 814-1024 in A. Engler,Das Pflanzen- J. Bot.,Lond. 4: 128-129. reich.IV. 276c. AkademieVerlag, Berlin.

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