筆花豆

Perennial, Shrubs, Herbs, Stems woody below, or from woody crown or caudex, Taproot present, Nodules present, Stems or branches arching, spreading or decumbent, Stems prostrate, trailing, or mat forming, Stems less than 1 m tall, Stems solid, Stems or young twigs sparsely to densely hairy, Leaves alternate, Leaves petiolate, Stipules conspicuous, Stipules green, triangulate to lanceolate or foliaceous, Stipules persistent, Stipules clasping stem at the base, Stipules adnate to petiole, Stipules connate to each other, forming a tuber or sheath, Leaves compound, Leaves pinnately 3-foliolate, Leaves odd pinnate, Leaf or leaflet margins entire, Leaflets opposite, Leaflets 3, Leaves glabrous or nearly so, Leaves hairy on one or both surfaces, F lowers in axillary clusters or few-floweredracemes, 2-6 flowers, Inflorescences spikes or spike-like, Inflorescence axillary, Inflorescence terminal, Bracts conspicuously present, Bracteoles present, Flowers zygomorphic, Calyx 5-lobed, Calyx glabrous, Petals separate, Corolla papilionaceous, Petals clawed, Petals ochroleucous, cream colored, Petals orange or yellow, Banner petal ovoid or obovate, Wing petals narrow, oblanceolate to oblong, Wing tips obtuse or rounded, Stamens 9-10, Stamens or anthers dimorphic, alternating large and small, Stamens monadelphous, united below, Filaments glabrous, Style terete, Fruit a loment, jointed, separating into articles, Fruit unilocular, Fruit freely dehiscent, Fruit elongate, straight, Fruit rugose wrinkled or reticulate, Fruit exserted from calyx, Fruit hairy, Fruit 1-seeded, Seeds ovoid to rounded in outline, Seed surface smooth, Seeds olive, brown, or black.

Stylosanthes guianensis, the stylo, is a species of flowering plant in the family Fabaceae. It is native to the New World Tropics and Subtropics, and has been introduced to Puerto Rico, the Windward Islands, Trinidad and Tobago, most of Sub‑Saharan Africa, Madagascar, Mauritius, Réunion, Rodrigues, the Indian Subcontinent, Sri Lanka, Thailand, southeast China, Hainan, Taiwan, New Guinea, Queensland, New Caledonia, and the Cook Islands. An important forage and fodder species, its palatability to livestock increases as the plant matures, making it an unusual, and valuable, deferred feed. It has high genetic diversity between and among its named varieties.