Rhinotropis lindheimeri var. eucosma (S. F. Blake) J. R. Abbott

Polygala eucosma Blake, Contr. Gray Herb. 47: 72. 1916.
Fruticulose, many-stemmed, procumbent, 4.5-20 cm. long or more, very leafy, minutely incurved-puberulous; leaves oval or elliptic, 4-9 mm. long, 2-6.5 mm. wide, acute or obtuse, cuneate at base, coriaceous, scarcely reticulate, glabrous or very sparsely incurved-puberulous; racemes 2-3-flowered, about 7 mm. long; pedicels glabrous, 0.8-1.8 mm. long; flowers rosy; upper sepal ovate, ciliolate, 2-2.8 mm. long; lower sepals elliptic, glabrous or ciliolate, 1.3-2.5 mm. long; wings obovate, 4-4.5 mm. long, 1.8-2.8 mm. wide, mucronulate or retuse at the obtuse or truncate apex, cuneate at base, glabrous; keel ciliolate above on the saccate portion, 4.3-4.8 mm. long, the oblong porrect or decurved papillose beak 1-1.2 mm. long; stamens 7; capsule oval or oblong-ovate, striate, sparsely puberulous or subglabrous, 3.8-4.2 mm. long, 2.6 mm. wide; seed densely silky-pilose, 3 mm. long; aril 1.8-2 mm. deep, the 2 linear-oblong subentire lobes appressed.
Type locality: Sierra Madre, 64 kilometers south of Saltillo, Coahuila. Distribution: Southern New Mexico to Hidalgo.