Dalea botterii (Rydb.) Barneby

Parosela botterii Rydberg, sp. nov
A shrubby perennial ; branches with scattered glands, glabrous or the younger part somewhat brownish-villous; leaves about 2 cm. long; stipules subulate, 2 mm. long; rachis glabrous; stipels conic, gland-like; leaflets 17-21, elliptic, 2-4 mm. long, glabrous, glandular-dotted beneath; peduncles at the ends of the branches, 2-3 cm. long; spikes dense, 3-5 cm. long, pyramidal, acute; bracts ovate-cordate, acuminate, glabrous, with a few glands, about equaling the calyx; calyx-tube campanulate, sparingly hirsute, more densely so at the mouth, glandular in the intervals, 3 mm. long; lobes linear-subulate from a deltoid base, 2.5 mm. long, plumose; corolla dark rose-purple; blade of the banner cordate, 4 mm. long, with an elongate gland at the apex and a semicircle of small glands near the base; blades of the wings and keel-petals with an acute basal lobe, the latter in the wings somewhat salient, in the keel-petals reflexed; blades of the wings 5 mm., those of the keel-petals 7 mm. long, the claws of both 3-4 mm. long. (Though the petals are rose-purple, the structure of the calyx and the more or less glandbearing petals associate this with the yellow-flowered species of the Leucostomae.)
Type collected ar Orizaba, Mexico, Bolter i 973 (Gray Herbarium).