Emory's Mimosa

Mimosa emoryana Benth. Trans. Linn. Soc. 30: 426. 1875
A shrub, the twigs densely pubescent and with short prickles. Rachis of the leaf with or without prickles; pinnae 1 or 3 pairs; leaflets 3-5 pairs, oblong, 2-3 mm. long, obtuse, softly villous on both sides; peduncles axillary, 1.5-2.5 cm. long; flowers in small heads; calyx and corolla pubescent; stamens twice as many as the corolla-lobes; legume 3-3.5 cm. long, 4-6 mm. wide, 3-5-jointed, more or less constricted between the joints, softly pubescent and setose, with prickly margins.
Type locality: Western Texas [Cibiilo of the Rio Grande]. Distribution: Western Texas.

Perennial, Shrubs, Woody throughout, Stems woody below, or from woody crown or caudex, Taproot present, Nodules present, Stems erect or ascending, Stems or branches arching, spreading or decumbent, Stems less than 1 m tall, Ste ms greater than 2 m tall, Trunk or stems armed with thorns, spines or prickles, Stems solid, Stems or young twigs glabrous or sparsely glabrate, Stems with hooked uncinate hairs or prickles, Leaves alternate, Leaves petiolate, Stipules conspicuous, Stipules setiform, subulate or acicular, Stipules persistent, Stipules free, Leaves compound, Leaves bipinnate, Leaf or leaflet margins entire, Leaflets opposite, Leaflets 10-many, Leaves hairy on one or both surfaces, Flowers solitary in axils, or appearing solitary, Inflorescences globose heads, capitate or subcapitate, Inflorescence axillary, Flowers actinomorphic or somewhat irregular, Calyx 5-lobed, Calyx glabrous, Petals united, valvate, Petals white, Imperfect flowers present, dioecious or polygamodioecious, Stamens 9-10, Stamens completely free, separate, Stamens long exserted, Filaments glabrous, Filaments pink or red, Style terete, Fruit a legume, Fruit a loment, jointed, separating into articles, Fruit unilocular, Fruit freely dehiscent, Fruit oblong or ellipsoidal, Fruit strongly curved, falcate, bent, or lunate, Fruit exserted from calyx, Fruit compressed between seeds, Fruit spiny, bur-like, with hooked bristles or prickles, Fruit hairy, Fruit 3-10 seeded, Seed with elliptical line or depression, pleurogram, Seeds subquadrate, Seed surface smooth, Seeds olive, brown, or black.