282 



P API LION ACE AE. 



[VOL. II. 



4. Psoralea obtusiloba T. & G. Black- 

 dotted Psoralea. (Fig. 2089.) 



Psoralea obtusiloba T. & G. Fl. N. A. i: 300. 1838. 

 Psoralea tenuiflora var. obtusiloba S. Wats. Bibliogr. 

 Ind. i: 255. 1878. 



Erect, i-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 2X"-i5" long, ^"^"widc, 

 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 floribunda Nutt. Many-flowered Psoralea. 



P.floribunda Nutt.; T. & G. Fl. N. A. i: 300. 1838. 



Stem i-4 high, profusely branching, canes- 

 cent, not glandular. Petioles 2#"-i5" long, 

 mostly shorter than the leaflets; stipules i#"- 

 3#" long, subulate, sometimes reflexed; leaves 

 3-5- sometimes 7-foliolate; leaflets 5"-i8" long, 

 iW-H" 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 i"-i#" 

 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 

 2^" long, compressed. 



Prairies, Illinois to Montana, Texas, Arizona and 

 Mexico. May-Oct. 



(Fig. 2090.) 



6. Psoralea linearifdlia T. &G. Narrow- 

 leaved Psoralea. (Fig. 2091.) 



Psoralea linearifolia T. & G. Fl. N. A. i: 300. 1838. 



Erect, i-2 high, widely branching; stems not 

 always glandular, glabrous, or sparingly pubes- 

 cent with appressed hairs. Stipules \yi"-$W 

 long, lanceolate or setaceous; leaves sessile or 

 short-petioled, i-3-foliolate; leaflets $"-15" long, 

 j//_ 2 // w ide, linear, rugose, glandular, glabrous 

 or with a few appressed hairs; peduncles I'-o/ 

 long; flowers blue, loosely scattered, 1-4 together 

 on slender pedicels 2 // -4 // long; bracts i" long, 

 ovate, acuminate; mature calyx canipanulate, 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. 



