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Begonia oxyanthera

Overview

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Vulnerable
Threat status

Description

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Family Begoniaceae

Perennial succulent herbs, very rarely subshrubs . Stem erect , frequently rhizomatous , or plants tuberous and either acaulescent or shortly stemmed, rarely lianoid or climbing with adventitious roots , or stoloniferous . Leaves simple , rarely palmately compound , alternate or all basal, petiolate , stipules usually deciduous; blade often oblique and asymmetric , rarely symmetric , margin irregularly serrate and divided , occasionally entire, venation usually palmate. Flowers unisexual , plants monoecious, rarely dioecious, (1 or) 2-4 to several, rarely numerous in dichotomous cyme, sometimes in panicles, with pedicel and bracts. Staminate flower : tepals 2 or 4 and decussate, usually outer ones larger, inner ones smaller; stamens usually numerous; filaments free or connate at base ; anthers 2-celled, apical or lateral . Pistillate flower: tepals 2-5(-10), usually free, rarely connate at base; ovary nodding , pendulous, or ascending , 1-3-, rarely 4-8-loculed; placentae axile or parietal ; styles 2 or 3(or more), free or fused at base, forked once or more; stigma turgid , spirally twisted-tortuous or U-shaped, capitate or reniform and setose-papillose. Capsule dry, sometimes berrylike, unequally or subequally 3-winged, rarely wingless and 3- or 4-horned; seeds very numerous, minute, oblong , testa pale brown, reticulate .

Two or three genera and more than 1400 species: widely distributed in the tropical and subtropical regions of the world; one genus and 173 species (141 endemic) in China.[1]

Genus Begonia

Perennial succulent herbs, rarely subshrubs . Stem erect , frequently rhizomatous , or plants tuberous and either acaulescent or shortly stemmed, rarely lianoid or climbing with adventitious roots , or stoloniferous . Leaves simple , rarely palmately compound , alternate or all basal; blade often oblique and asymmetric , rarely symmetric , margin often irregularly serrate and divided , occasionally entire, venation usually palmate; petiole long, weak; stipules membranous, usually deciduous. Flowers unisexual , plants monoecious, rarely dioecious, (1 or) 2-4 to several, rarely numerous , in dichotomous cymes, sometimes in panicle, with pedicels and bracts. Staminate flower : tepals 2 or 4 and decussate, usually outer ones larger, inner ones smaller; stamens usually numerous; filaments free or connate at base ; anthers 2-celled, apical or lateral ; connectives extended at apex, sometimes apiculate . Pistillate flower: tepals 2-5(-10) ; pistil composed of 2-5(-7) carpels; ovary inferior, 1-3(-7) -loculed; placentae axile or parietal ; styles 2 or 3(or more), free or fused at base, forked once or more; stigma turgid , spirally twisted-tortuous or U-shaped, capitate or reniform , setose-papillose. Capsule dry, sometimes berrylike, unequally or subequally 3-winged, rarely wingless and 3- or 4-horned; seeds very numerous, pale brown, oblong , minute, testa reticulate .

More than 1400 species: widely distributed in the tropical and subtropical regions of the world, with ca. 150 species in Africa, more than 600 species in Central and South America, and more than 600 species in Asia; 173 species (141 endemic) in China.[2]

Habitat

Ecology: Known from submontane and montane forest at 1,200–2,200(–2,400) m altitude . The increasing density of this species, moving northwards (Mt Cameroon and Bioko only ca. 2 sites each; Bamenda Highlands numerous sites and coll.) is perhaps a reflection of a longer dry season requirement.[3]


List of Habitats :1.6Forest - Subtropical/Tropical Moist Lowland 1.9Forest - Subtropical/Tropical Moist Montane

Taxonomy

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Notes

Publishing author : Warb. Publication : Bot. Jahrb. Syst. xxii. (1895) 35

Similar Species

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Members of the genus Begonia

ZipcodeZoo has pages for 3661 species, subspecies, varieties, forms, and cultivars in this genus. Here are just 100 of them:

Argostemma begoniaceum · B. -Semperflorens-Hybr. 'Lotto Rosa' · B. -Semperflorens-Hybr. 'Rosa Perle' · B. 'A.T. Shardlow' · B. abaculoides · B. abbottii · B. abdullahpieei · B. aberrans · B. 'Abidan' · B. aborensis · B. 'Abu-Dhabi' · B. abyssinica · B. acaulis · B. acerifolia · B. aceroides · B. acetosa (Ruby Begonia) · B. acetosella · B. acetosella var. hirtifolia · B. 'Ace High' (Begonia) · B. 'Ace of Spades' · B. acida · B. aconitifolia (Cane Begonia) · B. aconitifolia 'Metallica' · B. acrensis · B. aculeata · B. acuminata · B. acuminatissima · B. acutifolia · B. acutiloba · B. acutitepala · B. adenodes · B. adenopoda · B. adenostegia · B. adiantiformis · B. admirabilis · B. adolfi-friderici · B. 'Adonia' · B. adonis · B. 'Adora' · B. adpressa · B. adscendens · B. aequata · B. aequatorialis · B. aequilateralis · B. aeranthos · B. aff. sinensis · B. affinis · B. aggeloptera · B. agrial · B. agusanensis · B. 'Aladdin' · B. alaecida · B. 'Alafia' · B. 'Alamo III' · B. 'Alamo Melba' · B. 'Alamo Ole' · B. 'Alamo Snow' · B. alba · B. 'Albatross' · B. albida-setulosa · B. albidula · B. albo-picta · B. albo-picta var. rosea · B. albobracteata · B. albococcinea · B. albomaculata · B. albopicta (Bambusiforme Begonia) · B. albopicta 'Bunchii' (Bambusiforme Begonia) · B. albopicta 'Mary Ann Flunker' (Bambusiforme Begonia) · B. 'Albuquerque Midnight Sky' · B. alcarrasica · B. alchemilloides · B. 'Alecia Anderson' · B. alemanii · B. alepensis · B. 'Alfa Pink' · B. 'Alfa Rose' · B. algaia · B. alice-clarkae · B. alice-clarkiae · B. aliciae · B. 'Allan Clarke' · B. 'Allan Langdon' · B. Allegra Series · B. allenii · B. alleryi · B. 'All Round Dark Rose Green Leaf' · B. 'All Round Pink Green Leaf' · B. 'All Round Rose Bronze Leaf' · B. 'All Round Rose Pink Green Leaf' · B. almedana · B. alnifolia · B. alpina · B. altamiroi · B. altissima · B. alto-peruviana · B. altoperuviana · B. 'Alto Scharff' · B. alvarezii · B. alveolata

More Info

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Further Reading

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Notes

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Contributors

Data Sources

Accessed through GBIF Data Portal November 15, 2007:

Identifiers

Footnotes

  1. Cuizhi Gu, Ching-I Peng & Nicholas J. Turland "Begoniaceae". in Flora of China Vol. 13 Page 151, 153. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org. [back]
  2. "Begonia". in Flora of China Vol. 13 Page 153. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org. [back]
  3. Cheek, M. 2004. In IUCN 2008. 2008 IUCN Red List of Threatened Species. IUCNRedList.org. Downloaded July 19, 2008. [back]
Last Revised: 2009-07-03