282 PAPILIONACEAE. (Vor. II. 
4. Psoralea obtusiloba T. & G. Black- 
dotted Psoralea. (Fig. 2089.) 
Psoralea obtusiloba T. & G. Fl. N. A. 1: 300. 1838. 
Psoralea tenuiflora var. obtusiloba S, Wats. Bibliogr. 
Ind. 1: 255. 1878. 
Erect, 1°-2° high, branches spreading, stems 
more or less canescent with fine appressed silky 
white hairs. Stipules small, setaceous; petioles 
much shorter than the leaflets, the upper leavesoften 
nearly sessile; leaves 3-foliolate, or the basal often 
4-5-foliolate; leaflets 244’/-15’’ long, 114’’-7’’ wide, 
oblong-obovate, retuse or mucronulate, covered on 
both surfaces with minute black glands, glabrous 
above, minutely canescent beneath; racemes long; 
flowers loosely scattered; bracts very small, ovate, 
cuspidate; calyx canescent with white silky hairs, 
the lobes glandular, obtuse or acute; pod ovate, 
about 4/’ long; seed compressed, obliquely ovoid, 
brown. 
Prairies, Kansas (?), Texas to Arizona and Mexico. 
5. Psoralea floribanda Nutt. Many-flowered Psoralea. (Fig. 2090.) 
P. floribunda Nutt.; T. & G. Fl. N. A. 1: 300. 1838. 
Stem 1°-4° high, profusely branching, canes- 
cent, not glandular. Petioles 234’/-15/’ long, 
mostly shorter than the leaflets; stipules 114’/— 
314’ long, subulate, sometimes reflexed; leaves 
3-5- sometimes 7-foliolate; leaflets 5//-18’’ long, 
114//-4/ wide, oblong, glandular on both sur- 
faces, rugose, glabrous or with a few scattered 
hairs above, canescent with closely appressed 
white hairs beneath; peduncles 2/7’ long; spikes 
oblong or cylindric, usually many-flowered, the 
flowers about 4/’ long, at length interrupted and 
appearing almost as if whorled; bracts 1//-1 14’ 
long, lanceolate, hirsute; calyx canescent, the 
lobes triangular, acute, the lower one the longest; 
pod ovoid, glabrous, light brown, covered with 
darker glands, beak short, stout, straight; seed 
214’ long, compressed. 
Prairies, Illinois to Montana, Texas, Arizona and 
Mexico, May-Oct. 
\ 
6. Psoralea linearifolia T.&G. Narrow- 
v7 
Q & ) BW a KX th leaved Psoralea. (Fig. 2091.) 
Sean y SS \ Z Psoralea linearifolia T. & G. Fl. N. A. 1: 300. 1838. 
A\ 7 1 om Erect, 1°-2° high, widely branching; stems not 
Q Y Woo Wy h SS always glandular, glabrous, or sparingly pubes- 
NG \Y cent with appressed hairs. Stipules 14//-344// 
\ S long, lanceolate or setaceous; leaves sessile or 
NY) ? \ short-petioled, 1-3-foliolate; leaflets 5’’-15’’ long, 
1//-2// wide, linear, rugose, glandular, glabrous 
ma Y 
= i or with a few appressed hairs; peduncles 1/—9’ 
long; flowers blue, loosely scattered, 1-4 together 
on slender pedicels 2/’-4’’ long; bracts 1/’ long, 
ovate, acuminate; mature calyx campanulate, 2’ 
long, glandular, slightly pubescent; pod 4’ long, 
narrowly ovoid or oblong, glandular, with a short 
stout straightish beak; seed flat, oblique, dark 
brown. 
Prairies, Nebraska to Texas. May-—Aug. 
