282 PHANEROGAMOUS PLANTS. 



13. THEKMOPSIS, R.Br. 

 1. Thermopsis fab ace a, DC. 



Thermopsis fabacea, DC. Prodr. 2, p. 99 ; Hook. Fl. Bor.-Amer. 1, p. 128; Torr. & 

 Gray, Fl. 1, p. 388; Bot. Mag. t. 1272; Gray, in Mem. Amer. Acad. 6, p. 385. 

 T. montcma, Nutt. in Torr. & Gray, Fl. 1. c. ; Gray, PL Fendl. p. 38. 



Hab. Hillsides, valley of the Kooskooskee, Washington Terri- 

 tory. — Plant 2 to 3 feet high, erect, moderately branching above. 

 Stipules ovate, an inch long. Leaflets 2 to 3 inches long, varying 

 from elliptical-oval to obovate, somewhat silky, pubescent when young, 

 smooth when in fruit. Flowers alternate and in pairs, bright yellow. 

 Calyx campanulate ; the three upper teeth acute, half as long as the 

 tube, the two upper shorter and united more than half their length. 

 Legumes 2 to 3 inches long, and 2i lines wide, erect, 12-14-seeded. 



2. Thermopsis macyophtlla, EooJc. & Am. 



Hab. Near San Francisco, California. — The specimens are without 

 flowers, and the leaves scarcely more than an inch long. 



14. P1CKERINGIA, Nutt, 



1. Pickeringia Montana, Nutt. in Torr. & Gray. 



Hab. Sides of Mount Palmas, near San Francisco ; abundant. — A 

 rigid and much-branched evergreen spinescent shrub. The leaves 

 are sessile, and the leaflets vary from one-third to three-fourths of an 

 inch long. Flowers nearly sessile in the axils of the uppermost 

 leaves, and in short terminal racemes, about 8 lines long. Calyx 

 slightly 5-toothed. Carolla bright purple ; the petals of nearly equal 

 length. Vexillum suborbicular, nearly surrounding and inclosing the 



