This section is from the book "An Illustrated Flora Of The Northern United States, Canada And The British Possessions Vol2", by Nathaniel Lord Britton, Addison Brown. Also available from Amazon: An Illustrated Flora of the Northern United States, Canada and the British Possessions. 3 Volume Set..
D. lanuginosa Nutt.; T. & G. Fl. N. A. 1: 307. 1838.
Decumbent, branching, softly and densely pubescent throughout, 1°-2° long. Leaflets 9-13, obovate, obtuse, truncate or emarginate at the apex, narrowed or cuneate at the base, nearly sessile, 4"-6" long, about 2" wide above; spikes numerous, short-peduncled, 1'-4' long, rather loosely flowered; bracts oval or obovate, long-acuminate or mucronate, about \\" long; flowers 3" long; corolla deep purple or red; calyx-teeth subulate, plumose; standard cordate, slightly exceeding the wings and keel; stamens 10.
Psoralea Dalea L. Sp. Pl. 764. 1753.
Dalea alopecuroides Willd. Sp. Pl. 3: 1336. 1803.
Parosela Dalea Britton, Mem. Torr. Club. 5: 196. 1894.
Erect, branched, 1°-2° high, foliage glabrous. Leaflets 15-41, oblanceolate or linear-oblong, obtuse at the apex, narrowed at the base, sessile or nearly so, 2"-3" long, 1/2"-1" wide; spikes terminal, oblong, very dense, 1-2' long, about 5" thick, peduncled; bracts ovate or lanceolate, acuminate, deciduous, about equalling the calyx, hyaline-margined; calyx very silky-pubescent, its teeth linear-lanceolate, acuminate, plumose; corolla pink, or whitish, about 2" long; keel about equalling the wings.
Prairies, Illinois to Minnesota, Nebraska, South Dakota, Alabama, Texas, Arizona and Mexico. Aug.-Sept.
Dalea aurea Nutt. Fraser's Cat. 1813.
P. aurea Britton, Mem. Torr. Club 5: 196. 1894.
Erect, pubescent, simple, 1°-2° high. Leaflets 5-9, sessile, rather distant, obovate, oblong or oblanceo-late, obtuse at the apex, narrowed at the base, 4"-6" long, 1 1/2"-2 1/2" wide; spikes solitary, short-peduncled, ovoid or globose, very dense, 1'-3' long, 6"-8" thick; bracts ovate, mucronate, shorter than the densely plumose and pubescent calyx-teeth; corolla yellow, 4"-5" long; standard much shorter than the wings and keel.
Prairies, South Dakota to Missouri (?), Nebraska, Colorado and Texas. Summer.
1849. P. nana Heller, Cont. Frank. & Marsh. Coll. 1: 49.
Suffrutescent, erect, silky-villous throughout. Stems several from the same root, branched, 3'-10' high; leaflets 3-5, rarely 4"-5" long, obovate to linear-oblong, obtuse or mucronulate, narrowed at the base, rarely glabrate above, and usually minutely glandular beneath; petioles as long as the leaflets; spikes oblong-ovoid, 5" - 10" long, short-peduncled; bracts ovate, mucronate or aristate, shorter than the calyx, caducous; corolla yellow, longer than the setaceous and plumose calyx-teeth; standard shorter than the wings and keel.
Parosela Jámesii (Torr.) Vail, with large thick spikes up to 3 1/2' long, the bracts as long as the calyx or longer, the leaves 3-foliolate, ranges from Colorado to Texas and New Mexico, and is recorded from Kansas.