The Fabaceae are herbs, vines, shrubs, trees, and lianas found in both temperate and tropical areas. They comprise one of the largest families of flowering plants, numbering 630 genera and 18,000 species. The leaves are stipulate, nearly always alternate, and range from bipinnately or palmately compound to simple. The petiole base is commonly enlarged into a pulvinus that commonly functions in orientation of the leaves (sometimes very responsively, as in the sensitive plant, Mimosa pudica). The flowers are usually bisexual, actinomorphic to zygomorphic, slightly to strongly perigynous, and commonly in racemes, spikes, or heads. The perianth commonly consists of a calyx and corolla of 5 segments each. The androecium consists of commonly 1- many stamens (most commonly 10), distinct or variously united, sometimes some of them reduced to staminodes. The pistil is simple, often stipitate, comprising a single style and stigma, and a superior ovary with one locule containing 2-many marginal ovules. The fruit is usually a legume, sometimes a samara, loment, follicle, indehiscent pod, achene, drupe, or berry. The seeds often have a hard coat with hourglass-shaped cells, and sometimes bear a u-shaped line called a pleurogram. [Carr]
There are approximately 1,065 species, subspecies, varieties, forms, and cultivars in this genus. Here are just 100 of them: V. abbreviata montenegrina · V. abbreviata orbelica · V. angustifolia pseudoangustifolia · V. angustifolia segetalis · V. argentea serinica · V. benghalensis heterocalyx · V. costata ciceroidea · V. cracca grossheimii · V. cracca kitaibeliana · V. cracca oreophila · V. cracca tenuifolia · V. glauca giennense · V. grandiflora biebersteinii · V. hyrcanica assyriaca · V. hyrcanica megalodonta · V. hyrcanica noeana · V. lunata grandiflora · V. narbonensis faboidea · V. narbonensis galilaea · V. nissoliana sojuchica · V. peregrina aintabensis · V. peregrina curvituba · V. peregrina megalosperma · V. peregrina persepolitana · V. sativa linearifolia · V. sativa pilosa · V. sativa stenophylla · V. sepium eriocalyx · V. sericocarpa mardinica · V. sericocarpa mollis · V. sericocarpa pseudomollis · V. sericocarpa urfae · V. tenuifolia subalpina · V. tetrasperma eutetrasperma · V. truncatula balansae · V. unijuga minor · V. variegata himalaica · V. venosa cuspidata · V. venosa stolonifera · V. venosa yamanakae · V. villosa maniatissa · V. villosa monantha · V. villosa semicretica · V. parviflora · V. abbreviata · V. abyssinica · V. acerosa var. angustifolia · V. acutifolia (Fourleaf Vetch) · V. adriatica · V. afghanica · V. agerii · V. agrigentinum · V. aintabensis · V. albescens · V. albicans · V. albiflora · V. alpestris (Goroshek Gornyi) · V. alpestris alpestris · V. alpestris hypoleuca · V. alpina · V. alternans · V. alternifolia · V. altissima · V. americana (American Deervetch) · V. americana americana · V. americana f. angusta · V. americana f. oblonga · V. americana mexicana · V. americana minor · V. americana var. angustifolia · V. americana var. bungei · V. americana subsp. minor · V. americana var. oregana · V. americana var. sinensis · V. amoena (Cheder Ebs) · V. amoena amoena · V. amoena f. albiflora · V. amoena sericea · V. amphicarpos · V. amurensis (Amaryn Gish) · V. amurensis f. alba · V. amurensis f. sanneensis · V. amurensis var. pallida · V. anatolica · V. anderssonii · V. andicola · V. andicola var. galbina · V. andicola var. matthewsii · V. angulata · V. angulosa · V. anguste-pinnata · V. angustifolia angustifolia · V. angustifolium · V. anisodonta · V. annuell · V. annuell gelb · V. anomala · V. tenuifolia · V. aphylla · V. aquitanica
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