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Project Name Data (Last Modified On 10/1/2013)

Flora Data (Last Modified On 10/1/2013)
Contributor W. G. D'Arcy
Synonym Trifolium L., Sp. P1. 764, 1753; Gen. PI., ed. 5. 337. 1754. TYPE: T. pratense L.
Description Annual or perennial herbs. Leaves mostly trifoliolate, the leaflets minutely toothed at the apex. Inflorescences axillary or pseudo terminal, disposed as
Habit herbs
Description heads, umbels or as short racemes on ascending peduncles. Flowers small; calyx tubular, glabrous or pubescent, the 5 teeth usually bristle tipped, equal or nearly so; keel petals shorter than the wing petals, some or all of the petals connate and adnate to the staminal sheath; stamens diadelphous, some or all of the filaments apically expanded, the anthers alike; ovary small, few-ovulate, the styles short, curved, glabrous, the stigma minute, capitate. Fruits small, mostly enclosed in the calyx, mostly indehiscent, thin; seeds few (or 1).
Note This genus includes some 300 species
Distribution temperate and subtropical regions.
Note Many species are important fodder plants. They are also important sources of honey. "Clover." "Trebol."
Common Clover Trebol
Key a. Upper calyx lobes shorter than the others; petioles pubescent; leaflets mostly less than 10 mm long; inflorescence mostly less than 10 mm across; flowering pedicels less than 2 mm long, the peduncle long hairy ...... 1. T. dubium aa. Upper calyx lobes longer than the others; petioles glabrate; leaflets mostly much more than 10 mm long, inflorescence mostly more than 15 mm across; flowering pedicels more than 3 mm long, the peduncle glabrate ...... 2. T. repens
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