Flor De San Jose

Isandrina maxonii Britton & Rose, sp. nov
A tree, 5-12 m. high, the young twigs short-tomentose. Stipules setaceous, about 3 mm. long; leaflets 2 or 3 pairs, obovate or elliptic, 4-1 1 cm. long, dark green and puberulent above, pale green and loosely pubescent beneath, the apex rounded or retuse, the base, at least of the upper pair, cuneate, the pinnate venation prominent; fruiting peduncle about 3 cm. long or shorter; fruiting pedicels about 2 cm. long; legume 2-3 dm. long, about 9 mm. wide, glabrous, short-stipitate, reticulate-veined, slightly impressed between the seeds.
Nicaragua. Type from Tamagasta Peninsula, west of Managua, June 25, 1923, Maxon, Han'ey &• Valentine 7313.

Perennial, Trees, Shrubs, Woody throughout, Stems erect or ascending, Stems or branches arching, spreading or decumbent, Stems greater than 2 m tall, Stems solid, Stems or young twigs glabrous or sparse ly glabrate, Stems or young twigs sparsely to densely hairy, Leaves alternate, Leaves petiolate, Stipules inconspicuous, absent, or caducous, Stipules setiform, subulate or acicular, Stipules persistent, Stipules free, Leaves compound, Leaves even pinnate, Leaf or leaflet margins entire, Leaflets opposite, Leaflets 4, Leaflets 5-9, Leaflets 10-many, Leaves glabrous or nearly so, Inflorescences racemes, Inflorescence panicles, Inflorescence axillary, Bracts conspicuously present, Flowers actinomorphic or somewhat irregular, Calyx 5-lobed, Calyx hairy, Petals separate, Petals orange or yellow, Fertile stamens 6-8, Stamens completely free, separate, Filaments glabrous, Anthers opening by basal or terminal pores or slits, Style terete, Fruit a legume, Fruit stipitate, Fruit unilocular, Fruit freely dehiscent, Fruit elongate, straight, Fruit coriaceous or becoming woody, Fruit exserted from calyx, Fruit compressed between seeds, Fruit glabrous or glabrate, Fruit 11-many seeded, S eed with elliptical line or depression, pleurogram, Seeds ovoid to rounded in outline, Seed surface smooth, Seeds olive, brown, or black.

Senna atomaria, the flor de San Jose, is a species of flowering plant in the family Fabaceae, native to Mexico, Central America, the Caribbean, Colombia, and Venezuela. A shrub or small tree, it is considered a multi-purpose species; fuel, wood, biomass, soil improvement, medicine, and ornament.