Some Nomenclatural Changes In The Sections Of Begonia L
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Some Nomenclatural Changes In The Sections Of Begonia L
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Author : Andrey I. Baranov
language : en
Publisher:
Release Date : 1972
Some Nomenclatural Changes In The Sections Of Begonia L written by Andrey I. Baranov and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1972 with categories.
The Sections Of Begonia
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Author : J. Doorenbos
language : en
Publisher:
Release Date : 1998
The Sections Of Begonia written by J. Doorenbos and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with Nature categories.
A Revision Of Begonia Section Gobenia
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Author : Mark C. Tebbitt
language : en
Publisher:
Release Date : 2022
A Revision Of Begonia Section Gobenia written by Mark C. Tebbitt and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022 with Begonias categories.
The Begonian
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Author :
language : en
Publisher:
Release Date : 1987
The Begonian written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1987 with Begonias categories.
The Kew Record Of Taxonomic Literature Relating To Vascular Plants For
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Author :
language : en
Publisher:
Release Date : 1971
The Kew Record Of Taxonomic Literature Relating To Vascular Plants For written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1971 with Botany categories.
Effect Of Temperature On Development Dry Matter Production Dry Matter Production Dry Matter Distribution And Quality Of Forage Maize Zea Mays L
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Author : Paul Christiaan Struik
language : en
Publisher:
Release Date : 1983
Effect Of Temperature On Development Dry Matter Production Dry Matter Production Dry Matter Distribution And Quality Of Forage Maize Zea Mays L written by Paul Christiaan Struik and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1983 with Analysis of variance categories.
Revision Of Pearcea Gesneriaceae
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Author : Lars Peter Kvist
language : en
Publisher:
Release Date : 1996
Revision Of Pearcea Gesneriaceae written by Lars Peter Kvist and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with Gesneriaceae categories.
Seventeen species of Pearcea (Gesneriaceae) are recognized, nine of which are new: Pearcea bella, P. bilabiata, P. cordata, P. fuscicalyx, P. glabrata, P. gracilis, P. grandifolia, P. intermedia, and P. strigosa. Of the remaining eight species, two were originally described in Pearcea, one is transferred herein from Kohleria, and five come from Parakohleria, a genus placed in synonymy herein. Pearcea occurs mainly on the eastern Andean slopes of Colombia (5 species), Ecuador (12 species), Peru (6 species), and Bolivia (1 species), and one species also occurs on the western Andean slopes in Ecuador. The largest number of species appears to occur in Ecuador, although additional species may occur in less explored parts of Peru. Pearcea differs from related and similar genera in the Gloxinieae by having fleshy capsules dehiscing by two valves and exposing a sticky seed mass. All species are herbs, usually with bright red flowers, and are usually found in the shady, humid forest understory, often near small streams. Hybridization, local speciation, and polymorphic variation may complicate the species delimitation. The variable Pearcea sprucei occurs throughout nearly the entire range of the genus (and includes the only accepted variety, var. parviflora), but most species are rare and local.
Seed Micromorphology Of Neotropical Begonias
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Author : Anton De Lange
language : en
Publisher:
Release Date : 1999
Seed Micromorphology Of Neotropical Begonias written by Anton De Lange and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with Science categories.
The seeds of about 235 Neotropical Begonia species, representing almost all recognized American Begonia sections, were studied using scanning electron microscopy. The seeds show an appreciable diversity in size, shape, and micromorphology, which is helpful in the delimitation of sections and sometimes also of species. Mean seed length varies from 235 m in Begonia filipes to 1450 m in B. fruticosa; most seeds have a length between 300 m and 600 m. The shape of the seeds varies from almost globular to narrowly elliptic, and the length to width ratio ranges from 1.2 in B. hexandra to 8.1 in B. fruticosa. Further differences exist in the shape of the testal cells, the undulation of the anticlinal walls, the bulging of the outer periclinal walls, and the pattern and roughness of the cuticle. Five of the 15 mainly Brazilian, five of the 12 Andean and Guianan, and one of the eight middle American sections have a seed structure that is characteristic at the sectional level. All these sections have a relatively restricted geographical distribution, and they may differ in growth form or habitat. Most species of the other sections, including the larger and more widely distributed sections Begonia, Gireoudia, and Knesebeckia, have seeds conforming to the ordinary seed type. In a number of the sections, the structural differences of the seeds are nicely correlated with differences in growth form and/or in means of dispersal. In contrast to the African begonias, the great majority of the Neotropical begonias have anemoballistic dispersal. Seeds may be adapted to wind dispersal by extended micropylar and/or chalazal ends with inflated, air-filled cells, such as in the Brazilian sections Solananthera, Trendelenburgia, and Enita and in the Andean section Rossmannia, or by a more pronounced surface with deep, collapsed testal cells, such as in sections Gobenia and Scheidweileria. Zooballistic dispersal by passing animals is supposed to be present in section Casparya. The seeds of sections Casparya and Trachelocarpus have very pronounced cuticular patterns and may be secondarily dispersed by rain wash or by adhering to animals. No distinct indications for an intercontinental relationship between Neotropical, African, and Asiatic sections could be established.
Phytologia
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Author :
language : en
Publisher:
Release Date : 1978
Phytologia written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1978 with Botany categories.
A journal of plant systematics, phytogeography and vegetation ecology.
The Kew Record Of Taxonomic Literature
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Author :
language : en
Publisher:
Release Date : 1972
The Kew Record Of Taxonomic Literature written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1972 with Plants categories.
