A Revision of American Velloziaceae

Total Page:16

File Type:pdf, Size:1020Kb

A Revision of American Velloziaceae SMITHSONIAN CONTRIBUTIONS TO BOTANY NUMBER 30 A Revision of American Velloziaceae Lyman B. Smith and Edward S. Ayensu SMITHSONIAN INSTITUTION PRESS City of Washington 1976 ABSTRACT Smith, Lyman B., and Edward S. Ayensu. A Revision of American Velloziaceae. Srnithsonian Contributions to Botany, number 30, 172 pages, frontispiece, 53 fig- ures, 37 plates, 1976.-With the aid of leaf anatomy, the systematics of 4 genera and 229 species of the American Velloziaceae is brought u to date. The scleren- chyma patterns and other anatomical characters that proves diagnostically impor- tant in earlier studies, continue to be most useful in delimiting the major genera and species in the present study. An introduction summarizing the major problems yet unravelled in this family and the current and prospective means for solving such problems, are discussed. Taxonomic keys, synonyms, and information on species distribution are included in this revision. Descriptions of new species and of higher taxa are also provided. OFFICIAL PUBLICATION DATE is handstamped in a limited number of initial copies and is recorded in the Institution’s annual report, Smithsonian Year. SERIESCOVER DESIGN: Leaf clearing from the katsura tree Cercidiphyllum japonicum Siebold and Zuccarini. Library of Congress Cataloging in Publication Data Smith, Lyman B. A revision of American Velloziaceae. (Smithsonian contributions to botany ; no. 30) Bibliography: p. Su t. of Docs. no.: SI 159:30 1. !‘elloziaceae 2. Botany-America. I. Ayensu, Edward S., joint author. 11. Title. 111. Series: Smithsonian Institution. Smithsonian contributions to botany ; no. 30. QKl.SZ747 no. 30 [QK495.V41 581‘.08s 1584’291 75-619289 For sale by the Superintendent of Documents, U. S. Government Printing 051~ Washington, D.C. 20402 - Price $0.00 (paper cover) Contents Page Introduction 1 VELLOZIACEAE............................................................. 2 Key to the Subfamilies and Genera of Vel 3 1. Subfamily BARBACENIOIDFAEMenaes . , 4 1. Barbacenia Vandelli .......................................................... 4 Key to the Subkeys of Barbacenia , , 4 Key to the Species of Barbacenia . ............. 4 Subkey I ......................... 11 1. Barbacenia brachycalyx Goethart & Henrard , . ........... 11 2. Barbacenia cylindrica L. B. Smith & Ayensu, new .................... 11 3. Barbacenia spiralis L. B. Smith .......... 11 4. Barbacenia beauuerdii Damazio .......................................... 12 5. Barbacenia pabstiana L. B. Smith & Ayensu, new species 12 6. Barbacenia caricina Goethart & Henrard ........................ 13 7. Barbacenia delicatula L. B. Smith & Ayensu, new species ......... 13 8. Barbacenia squamata Herbert ................................. 13 9. Barbacenia rogieri hortus ex Moore & Ayres ............................... 13 10. Barbacenia seubertiana Gwthart & Henrard ...... .......... 13 11. Barbacenia gaueensis Goethart & Henrard ................................. 14 12. Barbacenia stenophylla Goethart & Henrard ............................... 14 13. Barbacenia inclinata Goethart & Henrard ..................... 14 14. Barbacenia longiscapa Goethart & Henrard ................................ 14 15. Barbacenia hatschbachii L. B. Smith & Ayensu, new species ................. 14 16. Barbacenia monticola L. B. Smith & Ayensu, new species ................... 14 17. Barbacenia flavida Goethart & Henrard ...... ............ 15 15 ......................... 15 15 21. Barbacenia goethartii Henrard , , 16 22. Barbacenia breuifolia Taubert .............................. 16 22a. Barbacenia breuifolia var. breuifolia ................... 16 22b. Barbacenia breuifolia var. recuruata L. B. Smith 16 23. Barbacenia ionantha L. B. Smith ......................................... 16 .............. 16 17 26. Barbacenia nigrimarginata L. B. Smith . , ................... 17 17 18 29. Barbacenia andersonii L. B. Smith 18 18 18 18 32. Barbacenia schwackei Goethart & Henrard ................................. 19 33. Barbacenia fulva Goethart & Henrard . 19 19 19 19 37. Barbacenia coccinea Martius ex Schultes f. 19 38. Barbacenia glutinosa Goethart & Henrard ................................. 19 39. Barbacenia markgrafii Schulze-Menz ...................................... 19 iii iv SMITHSONIAN CONTRIBUTIONS TO BOTANY pose 40. Barbacenia ignea Martius ex Schultes f. 19 41. Barbacenia lilacina Goethart & Henrard 20 41a. Barbacenia lilacina var. lilacina . , . 20 41b. Barbacenia lilacina var. pallidiflora Henrard ex L. B. .......... 20 42. Barbacenia wandellii Pohl ex Seubert , . ... 20 43. Barbacenia brasiliensis Willdmow . 20 44. Barbacenia nanuzae L. B. Smith & Ayensu, new species , . 20 45. Barbacenia hirtiflora Goethart & Henrard . 21 46. Babacenia williamsii L. B. Smith . , , , ............. 21 21 47a. Barbacenia flaw var. flawa 21 21 48. Barbacenia glauca Martius ex Schultes f. 21 49. Barbacenia itabirensis Gwthart & Henrard , , . 21 50. Barbacenia sellowii Goethart & Henrard . 22 ............... 22 22 ...................... ............... 22 22 22 55. Barbacenia luzulifolia Martius ex Schultes f. , , . , . 23 25 57. Barbacenia reflexa L. B. Smith & Ayensu, new species . 23 58. Barbacenia graminifolia L. B. Smith . , . , . 24 59. Barbacenia latifolia L. B. Smith & Ayensu, new species 24 24 61. Barbacenia wiscosissima Goethart & Henrard ................... 25 25 63. Barbacenia exsca@ Martius , . .. ... .. ... 25 64. Barbacenia rectifolia L. B. Smith & Ayensu, new species .t........ 25 65. Barbacenia aurea L. B. Smith & Ayensu, new species . .......... 26 66. Barbacenia coronata P. F. Ravenna, new species . , . 27 67. Barbacenia sessiliflora L. B. Smith . 27 68. Barbacenia nana L. B. Smith & Ayensu, new species . 27 69. Barbacenia gentianoides Goethart & Henrard . .. 28 69a. Barbacenia gentianoides var. gentianoides . 28 69b. Barbacenia gentianoides var. magalhaesii (L. B. Smith) L. B. Smith & Ayensu, new combination, new status . 28 70. Barbacenia plantaginea L. B. Smith , , . ........... 28 71. Barbacenia hilairei Goethart & Henrard . , . 28 72. Barbacenia oxyte$ala Goethart & Henrard . 28 73. Barbacenia grisea L. B. Smith . .. 28 74. Barbacenia filamentifera L. B. Smith & Ayensu, new species , , . , . 29 29 30 30 30 31 80. Barbacenia cyananthera L. B. S 31 81. Barbacenia schidigera Lemaire . 32 82. Barbacenia graciliflora L. B. Smith ............. 32 32 84. Barbacenia ensifolia Martius ex Schultes f. 33 33 33 87. Barbacenia cusfiidata Goethart & Henrard . .......... 33 88. Barbacenia albiflora L. B. Smith , . , . ... .. .. .. , . ... .. .. .. ... .. 33 89. Barbacenia bibiriensis L. B. Smith & Ayensh, new species 33 NUMBER 30 V page 90. Barbacenia longiflora Martius ....... 34 91. Barbacenia gardneri Seubert .............................................. 34 92. Barbacenia curuiflora Goethart & Henrard ..... ............. 34 93. Barbacenia fragrans Goethart & Henrard .................................. 34 94. Barbacenia tricolor Martius .......... ............................ 34 95. Barbacenia blanchetii Goethart & Hen 35 96. Barbacenia mollis Gwthart & Henrard .................................... 35 96a. Barbacenia mollis var. mollis ... 35 96b. Barbacenia mollis var. microphyl 35 97. Barbacenia culta L. B. Smith & Ayensu, new species ........................ 35 98. Barbacenia leucopoda L. B. Smith .......... 36 99. Barbacenia sordida L. B. Smith & Ayensu, new 36 100. Barbacenia blackii L. B. Smith ............. ................... 36 101. Barbacenia rubra L. B. Smith .............. 36 102. Barbacenia damaziana Beauverd .......................................... 37 103. Barbacenia bahiana L. B. Smith .......................................... 37 2. Barbaceniopsis L. B. Smith ............................................. 37 Key to the Species of Barbaceniopsis ...... ........................ 37 1. Barbaceniopsis boliviensis (Baker) L. B. Smith ............................ 37 2. Barbaceniopsis humahuaquensis Noher .................................... 37 3. Barbaceniopsis vargasiana (L. B. Smith) L. B. Smit 38 2. Subfamily VELLOZIOIDEAEMenezes ...................... 38 3. Nanuza L. B. Smith & Ayensu, new genus ............ ................. 38 1. Nanuza plicata (Martius) L. B. Smith & Ayensu, n ination .......... 38 4. Vellozia Vandelli ............................................................. 40 Key to the Sections and Subkeys of Vellozia ................. 40 Key to the Species of Vellozia ............................................ 40 1. Section Xerophytoides L. B. Smith & Ayensu, new section .................... 48 1. Vellozia abietina Martius ............................ 48 2. Vellozia tragacantha (Martius ex Schultes f.) Martius ex Seubert ............ 48 3. Vellozia scoparia Goethart & Henrard .................................... 48 4. Vellozia minima Pohl ............................................ 51 5. Vellozia virgata Goethart & Henrard ...................................... 51 2. Section Vellozia ................................................ 51 Subkey I ........................... ..................................... 51 6. Vellozia ciliata L. B. Smith ............................................... 51 7. Vellozia taxifolia (Martius ex Schultes f.) Martius ex Seubert ............... 51 8. Vellozia cryptantha Seubert .............................................. 51 9. Vellozia maxillarioides L. B. Smith ........................................ 51 10. Vellozia costata L. B. Smith & Ayensu, new species ......................... 51 11. Vellozia alata L. B. Smith ...............................................
Recommended publications
  • Supplementary Data Sterner, Beckett* and Scott Lidgard. (Under Revision
    Supplementary Data Sterner, Beckett* and Scott Lidgard. (Under revision) “Moving Past the Systematics Wars.” Journal of the History of Biology. *Corresponding author E-mail: [email protected] Table S1 Examples of additive coding procedures used in conjuction with both phenetic & cladistic methodologies. Methods Taxa & Characters Use of additive Publication coding phenetic hyphomycetes fungi; phenetic Kendrick & Proctor morphology 1964 phenetic helminthosporium phenetic Ibrahim & Threlfall fungi; morphology, 1966 pathogenicity, physiology, biochemistry phenetic Listeria, Streptococci, phenetic Davis et al. 1969 related bacteria; morphology, biochemistry, sediment phenetic Agrobacterium; phenetic Kesters et al. 1973 morphology, biochemistry phenetic fossil nummulitid phenetic Barnett 1974 foraminifera; morphology phenetic anaerobic bacteria; phenetic Holmberg & Nord morphology, 1975 biochemistry phenetic actinomycete bacteria; phenetic Goodfellow et al. morphology, 1979 biochemistry phenetic freshwater sediment phenetic Mallory & Sayler bacteria; morphology, 1984 biochemistry phenetic nemerteans; phenetic Sundberg 1985 morphology, ecology, development phenetic rhodococci bacteria; phenetic Goodfellow et al. morphology, 1990 biochemistry phenetic actinomycete bacteria; phenetic O'Donnell et al. 1993 morphology, biochemistry phenetic Bacillus bacteria; phenetic Nielsen et al. 1995 biochemistry, DNA base composition phenetic fossil crinoids; skeletal phenetic Deline & Ausich 2011 morphology phenetic fossil crinoids; skeletal phenetic
    [Show full text]
  • Floristic and Ecological Characterization of Habitat Types on an Inselberg in Minas Gerais, Southeastern Brazil
    Acta Botanica Brasilica - 31(2): 199-211. April-June 2017. doi: 10.1590/0102-33062016abb0409 Floristic and ecological characterization of habitat types on an inselberg in Minas Gerais, southeastern Brazil Luiza F. A. de Paula1*, Nara F. O. Mota2, Pedro L. Viana2 and João R. Stehmann3 Received: November 21, 2016 Accepted: March 2, 2017 . ABSTRACT Inselbergs are granitic or gneissic rock outcrops, distributed mainly in tropical and subtropical regions. Th ey are considered terrestrial islands because of their strong spatial and ecological isolation, thus harboring a set of distinct plant communities that diff er from the surrounding matrix. In Brazil, inselbergs scattered in the Atlantic Forest contain unusually high levels of plant species richness and endemism. Th is study aimed to inventory species of vascular plants and to describe the main habitat types found on an inselberg located in the state of Minas Gerais, in southeastern Brazil. A total of 89 species of vascular plants were recorded (belonging to 37 families), of which six were new to science. Th e richest family was Bromeliaceae (10 spp.), followed by Cyperaceae (seven spp.), Orchidaceae and Poaceae (six spp. each). Life forms were distributed in diff erent proportions between habitats, which suggested distinct microenvironments on the inselberg. In general, habitats under similar environmental stress shared common species and life-form proportions. We argue that fl oristic inventories are still necessary for the development of conservation strategies and management of the unique vegetation on inselbergs in Brazil. Keywords: endemism, granitic and gneissic rock outcrops, life forms, terrestrial islands, vascular plants occurring on rock outcrops within the Atlantic Forest Introduction domain, 416 are endemic to these formations (Stehmann et al.
    [Show full text]
  • Homologies of Floral Structures in Velloziaceae with Particular Reference to the Corona Author(S): Maria Das Graças Sajo, Renato De Mello‐Silva, and Paula J
    Homologies of Floral Structures in Velloziaceae with Particular Reference to the Corona Author(s): Maria das Graças Sajo, Renato de Mello‐Silva, and Paula J. Rudall Source: International Journal of Plant Sciences, Vol. 171, No. 6 (July/August 2010), pp. 595- 606 Published by: The University of Chicago Press Stable URL: http://www.jstor.org/stable/10.1086/653132 . Accessed: 07/02/2014 10:53 Your use of the JSTOR archive indicates your acceptance of the Terms & Conditions of Use, available at . http://www.jstor.org/page/info/about/policies/terms.jsp . JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact [email protected]. The University of Chicago Press is collaborating with JSTOR to digitize, preserve and extend access to International Journal of Plant Sciences. http://www.jstor.org This content downloaded from 186.217.234.18 on Fri, 7 Feb 2014 10:53:04 AM All use subject to JSTOR Terms and Conditions Int. J. Plant Sci. 171(6):595–606. 2010. Ó 2010 by The University of Chicago. All rights reserved. 1058-5893/2010/17106-0003$15.00 DOI: 10.1086/653132 HOMOLOGIES OF FLORAL STRUCTURES IN VELLOZIACEAE WITH PARTICULAR REFERENCE TO THE CORONA Maria das Grac¸as Sajo,* Renato de Mello-Silva,y and Paula J. Rudall1,z *Departamento de Botaˆnica, Instituto de Biocieˆncias, Universidade
    [Show full text]
  • Alcantarea (Bromeliaceae) Leaf Anatomical Characterization and Its Systematic Implications
    Nordic Journal of Botany 28: 385Á397, 2010 doi: 10.1111/j.1756-1051.2010.00727.x, # The Authors. Journal compilation # Nordic Journal of Botany 2010 Subject Editors: Guido Grimm and Thomas Denk. Accepted 26 April 2010 Alcantarea (Bromeliaceae) leaf anatomical characterization and its systematic implications Leonardo M. Versieux, Paula Maria Elbl, Maria das Grac¸as Lapa Wanderley and Nanuza Luiza de Menezes L. M. Versieux ([email protected]), Depto de Botaˆnica, Ecologia e Zoologia, Univ. Federal do Rio Grande do Norte, Natal, RN, 59072- 970, Brazil. Á P. M. Elbl and N. Luiza de Menezes, Depto de Botaˆnica, Inst. de Biocieˆncias, Univ. de Sa˜o Paulo, Rua do Mata˜o, trav. 14, n. 321, Sa˜o Paulo, SP, 05508-090, Brazil. Á M. das Grac¸as Lapa Wanderley, Inst. de Botaˆnica, Caixa Postal 3005, Sa˜o Paulo, SP, 01061- 970, Brazil. Alcantarea (Bromeliaceae) has 26 species that are endemic to eastern Brazil, occurring mainly on gneissÁgranitic rock outcrops (‘inselbergs’). Alcantarea has great ornamental potential and several species are cultivated in gardens. Limited data is available in the literature regarding the leaf anatomical features of the genus, though it has been shown that it may provide valuable information for characterizing of Bromeliaceae taxa. In the present work, we employed leaf anatomy to better characterize the genus and understand its radiation into harsh environments, such as inselbergs. We also searched for characteristics potentially useful in phylogenetic analyses and in delimiting Alcantarea and Vriesea. The anatomical features of the leaves, observed for various Alcantarea species, are in accordance with the general pattern shown by other Bromeliaceae members.
    [Show full text]
  • Vegetación De Las Zonas Altas
    Fig. 7: Vegetación de las zonas altas húmeda (o de gramíneas) y la puna seca típica del altiplano atraviesa por tanto la Provincia Arque, conforme a las anotaciones hechas en su mapa por TROLL (1959). Festuca orthophylla (Iru-Ichu) es una gramínea perenne en macollos con hojas acuminadas punzantes, de crecimiento radial. Los macollos más viejos presentan la parte central declinada y forma áreas anulares de césped, un detalle señalado también por TROLL (1941). Parastrephia lepidophylla puede considerarse como una especie asociada bastante frecuente. En algunas áreas, Parastrephia muestra mayor número de ejemplares que Festuca. En estos casos se podría hablar de una formación arbustiva en escala pequeña (matorral). Parastrephia lepidophylla se presenta en forma aislada también en la puna de Festuca dolichophylla. Parastrephia, al igual que muchas especies micrófilas y también muy resinosas de Baccharis, se cuenta entre las tolas. Diferentes topónimos y nombres de lugares (en el área limítrofe entre Arque y Bolívar) probablemente señalan la presencia de Parastrephia: cerro Thola Loma, estancia Thola Pampa, Thola Pata Pampa. En las depresiones, donde los suelos son más húmedos, se presentan típicamente los cojínes planos de Azorella diapensioides. También SEIBERT MENHOFER (1991, 1992) consideran esta especie como indicadora de humedad ligeramente elevada del suelo. Lachemilla pinnata y Sporobolus indicus, conocidos indicadores de humedad, son plantas asociadas características. Casi todas las plantas representativas de esta comunidad fueron también encontradas en la puna de gramíneas en macollo de Festuca dolichophylla. 4.3. Comunidades de malezas En cuanto el hombre priva las superficies de vegetación natural para cultivar en ellas, se establecen otras plantas de crecimiento espontáneo, que a veces pueden competir con las plantas cultivadas o dificultar la cosecha de las mismas, por lo que son indeseadas por el hombre 10.
    [Show full text]
  • Germinação De Quatro Espécies De Velloziaceae Ocorrentes Em Diferentes Ambientes
    GERMINAÇÃO DE QUATRO ESPÉCIES DE VELLOZIACEAE OCORRENTES EM DIFERENTES AMBIENTES Letícia Anselmo Soares1,3e Queila Souza Garcia2,3 1Pós-graduanda - Bolsista CAPES; 2Docente; 3Departamento de Botânica, ICB, Universidade Federal de Minas Gerais ([email protected]) Pará e de V. plicata em Vitória, Espírito Santo. As INTRODUÇÃO sementes foram retiradas dos frutos e triadas para retirada das sementes murchas. A germinação foi A distribuição geográfica de muitas plantas é testada nas temperaturas constantes de 15, 20, 25, determinada, entre outros fatores, pela faixa de 30, 35 e 40 ºC, sob fotoperíodo de 12 horas e sob condições ambientais toleradas para a germinação escuro contínuo. Para cada tratamento foram de suas sementes (Labouriau, 1983). Luz e utilizadas quatro repetições de 25 sementes, em temperatura são fatores de grande importância no placas de Petri forradas com dupla camada de papel controle da germinação e dormência, tendo um filtro e umedecidas com solução de nistatina 0,1 papel crucial na regulação do crescimento e %. A germinação foi avaliada diariamente e a desenvolvimento das plantas (Baskin & Baskin emergência da radícula foi o critério estabelecido 1988). As condições em que o processo germinativo para germinação. Foram calculados a porcentagem ocorre, fornecem informações sobre o e o tempo médio de germinação. Dados normais e estabelecimento, a sucessão e regeneração de homogêneos foram submetidos a ANOVA e dados plantas em condições naturais (Vásquez-Yanes & não normais ou homogêneos foram submetidos ao Orozco-Segovia, 1993). teste de Kruskal-Wallis. Médias foram comparadas por teste de Tukey (p£ 0,05). A família Velloziaceae é essencialmente tropical e vive preferencialmente em afloramentos rochosos RESULTADOS E DISCUSSÃO localizados em regiões de altitudes elevadas (Mello- Silva, 1991).
    [Show full text]
  • Index Xylariorum 4.1
    Index Xylariorum 4.1 Compiled by Anna H. Lynch and Peter E. Gasson (version March 2010), and updated by IAWA under supervision of Frederic Lens (March 2016). Argentina SUCURSAL: Museo Argentino de Ciencias Naturales "B. Rivadavia" (BA/BAw), Av. Ángel Gallardo 470, 1405 Buenos Aires, Argentina. (updated 01/02/2016). Curator: Dr. ROBERTO R. PUJANA (comparative anatomy of extant and fossil woods), [email protected]. Collection: about 1000 specimens, 250 genera. Specialisation: Argentina, Paraguay. Herbarium vouchers: Yes; about 100,000; 92% of wood specimens vouchered. Periodical or serial publications: Revista del Museo Argentino de Ciencias Naturales Samples for sectioning: Yes. Microscope slides: Yes. Exchange: Yes. Wanted: Woods from Argentina and Paraguay. Catalogue: A catalogue of the wood collection is available on request from the curator. LA PLATA: Facultad de Ciencias Agrarias y Forestales, Universidad Nacional de La Plata. Argentina. (new wood collection since 01/02/2016). Curator: DRA. SILVIA MONTEOLIVA and PROF. STELLA MARIS RIVIERA (wood anatomy, identification), [email protected]. Collection: about 1000 specimens, 250 genera. Specialisation: Argentina Periodical or serial publications: Revista Facultad de Agronomía La Plata Samples for sectioning: Yes. Microscope slides: Yes. 1 Exchange: Yes. Wanted: woods from Argentina. Catalogue: A catalogue of the wood collection is available on request from the curator: www.maderasenargentina.com.ar TUCUMAN: Xiloteca of the Herbarium of the Fundation Miguel Lillo (LILw), Foundation Miguel Lillo - Institut Miguel Lillo, (LILw), Miguel Lillo 251, Tucuman, Argentina. (updated 05/08/2002). Foundation: 1910. Curator: MARIA EUGENIA GUANTAY, Lic. Ciencias Biologicas (anatomy of wood of Myrtaceae), [email protected]. Collection: 1,319 specimens, 224 genera.
    [Show full text]
  • Taxonomic Revision of Pseudolaelia Porto & Brade (Laeliinae
    Acta Botanica Brasilica 27(2): 418-435. 2013. Taxonomic revision of Pseudolaelia Porto & Brade (Laeliinae, Orchidaceae)1 Luiz Menini Neto2,5, Rafaela Campostrini Forzza3 and Cassio van den Berg4 Submitted: 14 September, 2011. Accepted: 7 March, 2013 ABSTRACT Pseudolaelia is a genus endemic to eastern Brazil. The species are often epiphytes on Velloziaceae or are saxicolous, predominantly on granitic and gneissic outcrops (inselbergs) in the Atlantic Forest and, less often, in the campos rupestres (dry, rocky grasslands) of the cerrado (savanna) and caatinga (shrublands). The genus is characterized by homoblastic pseudobulbs, long rhizomes, long and usually slender inflorescences, racemes or panicles, bearing pink, yellow or whitish flowers, labellum often 3-lobed, with simple, fimbriate or erose margin, semi-cylindrical or claviform column, cuniculus present. Twelve species are recognized; seven binomials are placed in synonymy. Of those seven, three are considered illegitimate because, contrary to the International Code of Botanical Nomenclature guidelines, there are no corresponding type specimens deposited in a recognized herbarium, and those three were therefore lectotypified. We present descriptions of, illustrations of and a dichotomous key to Pseudolaelia species, as well as addressing their taxonomy, ecology, conservation and geographic distribution. Key words: Eastern Brazil, campo rupestre, conservation, inselberg, taxonomy Introduction Ruschi (1946) established the genus Renata, describing the species R. canaanensis Ruschi, and publishing, in the Pseudolaelia Porto & Brade is a member of the subfamily same decade, P. dutrae Ruschi (Ruschi 1949), both from Epidendroideae, tribe Epidendreae, subtribe Laeliinae, and the mountains of the state of Espírito Santo. Pabst (1967) was defined as a monophyletic genus by van den Berg et al.
    [Show full text]
  • Ontogenesis of Stomata in Velloziaceae: Paracytic Versus Tetracytic? MARINA MILANELLO DO AMARAL1 and RENATO DE MELLO-SILVA1,2
    Revista Brasil. Bot., V.31, n.3, p.529-536, jul.-set. 2008 Ontogenesis of stomata in Velloziaceae: paracytic versus tetracytic? MARINA MILANELLO DO AMARAL1 and RENATO DE MELLO-SILVA1,2 (received: August 02, 2007; accepted: July 10, 2008) ABSTRACT – (Ontogenesis of stomata in Velloziaceae: paracytic versus tetracytic?). In Velloziaceae, the number of subsidiary cells has been used to characterize species and support groups. Nevertheless, the homology of the stomatal types have not been scrutinized. Stomatal ontogenesis of Vellozia epidendroides and V. plicata, assigned to have tetracytic stomata, and of V. glauca and Barbacenia riparia, assigned to have paracytic stomata, were investigated. In the four species studied, stomata followed perigenic development. Subsidiary cells arise from oblique divisions of neighbouring cells of the guard mother cell (GMC). These cells are elongated and parallel to the longer axis of the stoma. Polar cells show wide variation, following the shape and size of the epidermal cells in the vicinity. Hence, these cells cannot be called subsidiary cells. This wide variation is due to a much higher density of stomata in some regions of the leaf blade. This distribution of stomata forces the development of short polar cells, leading to an apparently tetracytic stomata. In regions of low concentration of stomata, higher spatial availability between the GMCs allows the elongation of polar cells, leading to evident paracytic stomata. Therefore, the four studied species are considered braquiparacytic, questioning the classification of stomata into tetracytic and paracytic in Velloziaceae. Key words - ontogenesis, paracytic, stomata, tetracytic, Velloziaceae RESUMO – (A ontogênese dos estômatos em Velloziaceae: paracítico versus tetracítico?).
    [Show full text]
  • Pollination of Two Species of Vellozia (Velloziaceae) from High-Altitude Quartzitic Grasslands, Brazil
    Acta bot. bras. 21(2): 325-333. 2007 Pollination of two species of Vellozia (Velloziaceae) from high-altitude quartzitic grasslands, Brazil Claudia Maria Jacobi1,3 and Mário César Laboissiérè del Sarto2 Received: May 12, 2006. Accepted: October 2, 2006 RESUMO – (Polinização de duas espécies de Vellozia (Velloziaceae) de campos quartzíticos de altitude, Brasil). Foram pesquisados os polinizadores e o sistema reprodutivo de duas espécies de Vellozia (Velloziaceae) de campos rupestres quartzíticos do sudeste do Brasil. Vellozia leptopetala é arborescente e cresce exclusivamente sobre afloramentos rochosos, V. epidendroides é de porte herbáceo e espalha- se sobre solo pedregoso. Ambas têm flores hermafroditas e solitárias, e floradas curtas em massa. Avaliou-se o nível de auto-compatibilidade e a necessidade de polinizadores, em 50 plantas de cada espécie e 20-60 flores por tratamento: polinização manual cruzada e autopolinização, polinização espontânea, agamospermia e controle. O comportamento dos visitantes florais nas flores e nas plantas foi registrado. As espécies são auto-incompatíveis, mas produzem poucas sementes autogâmicas. A razão pólen-óvulo sugere xenogamia facultativa em ambas. Foram visitadas principalmente por abelhas, das quais as mais importantes polinizadoras foram duas cortadeiras (Megachile spp.). Vellozia leptopetala também foi polinizada por uma espécie de beija-flor territorial. A produção de sementes em frutos de polinização cruzada sugere que limitação por pólen é a causa principal da baixa produção natural de sementes. Isto foi atribuído ao efeito combinado de cinco mecanismos: autopolinização prévia à antese, elevada geitonogamia resultante de arranjo floral, número reduzido de visitas por flor pelo mesmo motivo, pilhagem de pólen por diversas espécies de insetos e, em V.
    [Show full text]
  • Induced Expression of Xerophyta Viscosa Xvsap1 Gene Greatly Impacts Tolerance to Drought Stress in Transgenic Sweetpotato
    bioRxiv preprint doi: https://doi.org/10.1101/603910; this version posted April 9, 2019. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY-NC-ND 4.0 International license. 1 Induced expression of Xerophyta viscosa XvSap1 gene greatly impacts tolerance to 2 drought stress in transgenic sweetpotato 3 4 Wilton Mbinda1*, Christina Dixelius2, Richard Oduor3 5 6 7 8 1Department of Biochemistry and Biotechnology, Pwani University, Kilifi, Kenya 9 10 2Department of Plant Biology, Uppsala BioCenter, Linnéan Center for Plant Biology, 11 Swedish University of Agricultural Sciences, Uppsala, Sweden 12 13 3Department of Biochemistry and Biotechnology, Kenyatta University, Nairobi, Kenya 14 15 *Corresponding author: Wilton Mbinda; Email: [email protected]; Phone: 16 254722723950 17 18 19 20 21 22 23 24 25 26 27 28 bioRxiv preprint doi: https://doi.org/10.1101/603910; this version posted April 9, 2019. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY-NC-ND 4.0 International license. 29 Abstract 30 Key message Drought stress in sweetpotato could be overcome by introducing XvSap1 31 gene from Xerophyta viscosa. 32 33 Abstract. Drought stress often leads to reduced yields and is perilous delimiter for expanded 34 cultivation and increased productivity of sweetpotato. Cell wall stabilization proteins have 35 been identified to play a pivotal role in mechanical stabilization during desiccation stress 36 mitigation.
    [Show full text]
  • Rehydration from Desiccation: Evaluating the Potential for Leaf Water Absorption in X. Elegans
    Honors Thesis Honors Program 5-5-2017 Rehydration from Desiccation: Evaluating the Potential for Leaf Water Absorption in X. elegans Mitchell Braun Loyola Marymount University, [email protected] Follow this and additional works at: https://digitalcommons.lmu.edu/honors-thesis Part of the Biology Commons Recommended Citation Braun, Mitchell, "Rehydration from Desiccation: Evaluating the Potential for Leaf Water Absorption in X. elegans" (2017). Honors Thesis. 143. https://digitalcommons.lmu.edu/honors-thesis/143 This Honors Thesis is brought to you for free and open access by the Honors Program at Digital Commons @ Loyola Marymount University and Loyola Law School. It has been accepted for inclusion in Honors Thesis by an authorized administrator of Digital Commons@Loyola Marymount University and Loyola Law School. For more information, please contact [email protected]. Rehydration from Desiccation: Evaluating the Potential for Leaf Water Absorption in X. elegans A thesis submitted in partial satisfaction of the requirements of the University Honors Program of Loyola Marymount University by Mitchell Braun May 5, 2017 Abstract: Desiccation tolerance is the ability to survive through periods of extreme cellular water loss. Most seeds commonly exhibit a degree of desiccation tolerance while vegetative bodies of plants rarely show this characteristic. Desiccation tolerant vascular plants, in particular, are a rarity. Although this phenomenon may have potential benefits in crop populations worldwide, there are still many gaps in our scientific understanding. While the science behind the process of desiccating has been widely researched, the process of recovering from this state of stress, especially in restoring xylem activity after cavitation is still relatively unknown.
    [Show full text]