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Author: J. Doorenbos
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 276
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Book Description
Author: J. Doorenbos
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 276
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Book Description
Author: Andrey I. Baranov
Publisher:
ISBN:
Category : Begonias
Languages : en
Pages : 28
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Book Description
Author: Andrey I. Baranov
Publisher:
ISBN:
Category : Begoniaceae
Languages : en
Pages : 104
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Book Description
Author: Mark C. Tebbitt
Publisher:
ISBN: 9781943751136
Category : Begonias
Languages : en
Pages : 0
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Book Description
Author: Anton De Lange
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 60
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Book Description
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.
Author: Peter. W. Moonlight
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
We provide a floristic account for the Begoniaceae of Peru. The family is represented in Peru by 76 species, which are all members of the genus Begonia and represent eighteen sections. Twelve new species are described: B. condorensis Jara & Moonlight sp. nov., B. deltoides Moonlight sp. nov., B. huancabambae Moonlight sp. nov., B. imbrexiformis Moonlight sp. nov., B. longinqua Moonlight sp. nov., B. longitepala Moonlight sp. nov., B. nunezii Moonlight sp. nov., B. occultata J.P.Allen & Moonlight sp. nov., B. pedemontana Moonlight sp. nov., B. serratistipula Moonlight sp. nov., B. vargasii Moonlight sp. nov. and B. yuracyacuensis Moonlight sp. nov. We also provide four new records for the country: B. andina Rusby, B. brandbygeana L.B.Sm. & Wassh., B. neoharlingii L.B.Sm. & Wassh. and B. unilateralis Rusby. We provide an identification key to all species. The ecology, distribution, and conservation status of all Peruvian Begonia species are discussed, including provisional IUCN threat assessments. Most species are illustrated by either historical illustrations, contemporary photographic plates, or line drawings. Twenty-six names are newly synonymised including fifteen previously accepted species, and we designate eighty-three lectotypes, four neotypes, and four epitypes.
Author: Mark Tebbitt
Publisher:
ISBN: 9780578713526
Category :
Languages : en
Pages :
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Book Description
A comprehensive, accessible study of the 14 wild, Andean species of tuberous Begonia and their garden hybrids. This book updates the taxonomy of the tuberous begonias and discusses their natural history, conservation, artificial selection, and cultivation.
Author: Kathleen Burt-Utley
Publisher:
ISBN:
Category : Begoniaceae
Languages : en
Pages : 131
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Book Description
Author: Ruth Kiew
Publisher:
ISBN: 9789838121613
Category : Begonias
Languages : en
Pages : 293
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Book Description
Author: Mike Stevens
Publisher: Willowdale, Ont. : Firefly Books
ISBN:
Category : Gardening
Languages : en
Pages : 100
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Book Description
Mike Stevens presents a complete and readable guide to one of the most popular flowering plant choices: begonias. The Begoniaceae has as many as 1,000 known and identified species plus countless hundreds of hybrids. This informative and practical guide for gardeners focuses on the popular tuberous begonias, and also includes: history and key discoveries culture of non-tuberous begonias large-flowered tuberhybrida in containers year-round basket begonias fertilizers, soils, watering and propagation creating your own hybrids remedies for pests, diseases and disorders 95 beautiful full color photographs With dozens of the author's recommended species and hybrids plus nursery sources and a bibliography, Begonias is a solid reference work.
