364 



FABACEAE. 



Vol. II. 



10. Psoralea hypogaea Nutt. Small Indian Bread- 

 root. Fig. 2500. 



Psoralea hypogeae Nutt. ; T. & G. Fl. N. A. i ; 302. 1838. 



Similar to the preceding species, but smaller, nearly 

 acaulescent, the stem hardly rising above the ground, 

 densely pubescent with appressed whitish hairs. Petioles 

 2-4 times as long as the leaves; stipules oblong, acutish, 

 about 6" long; leaflets 5, digitate, sessile or nearly so, linear- 

 oblong or oblanceolate, i'-i4' long, 2"-3" wide, entire, often 

 mucronate-tipped, narrowed at the base ; peduncles ¥-3' 

 long; spikes short, dense, i'-i' long; bracts ovate, acute, 

 shorter than or nearly equalling the dull blue corolla; pod 

 S" long or more, somewhat hirsute, slender-beaked. 



Plains, Nebraska and Colorado to Texas, Montana and 

 New Mexico. May-.iune. 



II. Psoralea stipulata T. & G. Large-stipuled 

 Psoralea. Fig. 2501. 



Psoralea stipulata T. & G. FI. N. A. i : 688. 1840. 



Sparingly pubescent or glabrous, nearly glandless, 

 branched, diffuse or ascending, stems i°-2° long. Pe- 

 tioles shorter than the leaves ; stipules f oliaceous, ovate 

 or lanceolate, about 6" long; leaves pinnately 3-folio- 

 late ; leaflets oval or elliptic, i'-2' long, entire, narrowed 

 at the base, obtusish at the apex, the terminal one on 

 a stalk 3"-6" long; peduncles mainly axillary, longer 

 than the petioles; racemes short, dense, i' long or less; 

 flowers purple, 4"-5" long; bracts ovate, acute or acu- 

 minate, membranous, deciduous ; pod not seen. 



In rocky places, 

 June-July. 



Ohio, Indiana and Kentucky. Local. 



12. Psoralea pedunculata (Mill.) Vail. Samson's Snakeroot. Fig. 2502. 



Hedysarum pedunculatum Mill. Gard. Diet. Ed. 8, 



no. 17. 1768. 

 Psoralea melilotoides Michx. Fl. Bor. Am. 2 : 58. 1803. 

 P. pedunculata Vail, Bull. Torr. Club 21 : 114. 1891. 



Erect, slender, sparingly branched, i°-2j° high, 

 more or less pubescent and rough. Glands of the 

 foliage small and inconspicuous ; leaves petioled, 

 pinnately 3-f oliolate ; petioles shorter than or 

 equalling the leaflets ; stipules subulate ; leaflets 

 oblong-lanceolate, iV-i' long, 4"-7" wide, entire, 

 obtuse at each end, the apex mucronulate, the 

 terminal one on a stalk 2"-6" long; racemes axil- 

 lary and terminal, on peduncles much exceeding 

 the leaves, rather loosely flowered, 2'-5' long; 

 bracts ovate-lanceolate, acuminate, early decidu- 

 ous, glandular; flowers purplish, about 2" long; 

 pod nearly orbicular, strongly wrinkled trans- 

 versely. 



In dry soil, Virginia to Ohio, Illinois, Kansas, south 

 to Florida and Texas. March-July. Congo-root. 

 Bob's-root. 



