Mimosa quadrivalvis var. platycarpa (A. Gray) Barneby

Leptoglottis roemeriana (Scheele) Britton & Rose
Mimosa Roemeriana Scheele, Linnaea 21: 456. 1848. Schrankia platycarpa A. Gray, Best. Journ. Nat. Hist. 6: 18.^. 1850. Morongia Roemeriana Heller. Contr. Frank. & Marsh. Coll. 1: 44. 1895. Schrankia Roemeriana Blankinship. Rept. Mo. Bot. Gard. 18: 168. 1907.
Stem slender, prostrate, glabrous or puberulent, about 1 m. long or less, armed with short prickles. Stipules subulate, short ; petioles and rachis very slender, sparingly prickly ; pinnae 2-4 pairs; leaflets 6-12 pairs, oblong or the upper ones oblong-obovate, glabrous or ciliolate, 4-5 mm. long, obtuse, mucronulate, the delicate midvein central; peduncles prickly, 2-4 cm. long; legume compressed, 3-5 cm. long, about 5 mm. wide, densely or loosely prickly, its beak 3-5 mm. long.
Type locautv: New Braunfels. Texas. Distribution: Southern Texas.

Leptoglottis reverchonii Britton & Rose, sp. nov
Stem slender, prostrate or ascending, densely puberulent, 3-4 dm. long, copiously shortprickly. Stipules setaceous; leaves 6-8 cm. long, the slender petiole and rachis short-prickly, the petioles 2-3 cm. long; pinnae 3-5 pairs; leaflets 8-13 pairs, linear-oblong, 5-7 cm. long, ciliate, at least when young, cuspidate, the slender midvein excentric ; peduncles prickly, 3-6 cm. long; heads many-flowered; legume linear, compressed, densely long-prickly, 3.5-6 cm. long, about 5 mm. wide.
Calcareous prairies, among rocks, Dallas, Texas, May, June, 1877, /. Reiierchon.

Perennial, 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, 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 glabrous or nearly so, 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 unilocular, Fruit freely dehiscent, Fruit elongate, straight, Fruit oblong or ellipsoidal, Fruit exserted from calyx, Fruit spiny, bur-like, with hooked bristles or prickles, Fruit glabrous or glabrate, Fruit 3-10 seeded, Seed with elliptical line or depression, pleurogram, Seeds subquadrate, Seed surface smooth, Seeds oliv e, brown, or black.