144 



LEGUMINOSAE. 



obtuse, cuneate at base, 3-6 cm. long, glabrous above, pubescent beneath; 

 stipules ovate or lanceolate, large; petioles longer than the leaflets; raceme 

 terminal, short-peduncled, 8-16 cm. long; flowers yellow, somewhat whorled, 

 stout-pedicelled; calyx pubescent, with short broad teeth; corolla nearly 2 cm. 

 long; pods pubescent, dark-colored, linear, slender-beaked, 5-10 cm. long, 

 erect, 8-12-seeded. In moist places in pine woods. 



Thermopsis montana ovata Robinson. Leaflets broader, ovate. In 

 moist places in pine woods; more common than the species. 



206. LUPINTTS. LUPINE. 



Annuals or herbaceous or shrubby perennials ; leaves alternate 

 or basal, palmately 5-13-foliolate; flowers showy, often whorled, 

 in terminal spikes or racemes; calyx 2-lipped, the upper lip often 

 bifid, the lower sometimes 3-toothed; standard orbicular with 

 reflexed sides; wings obovate, united at the summit and enclosing 

 the falcate keel ; stamens united into a closed tube ; ovary sessile ; 

 pod more or less flattish, leathery and hairy. 



Corolla yellow. 



Flowers large; petals about 16 mm. long, deep yellow; 



leaflets 10-15 mm. broad. L. sabinii. 



Flowers smaller; petals about 10 mm. long, light yellow; 



leaflets less than 10 mm. broad. L. sulphureus. 



Corolla violet. 



Calyx saccate or spurred at the base. L. laxiflorus. 



Calyx symmetrical or nearly so. 

 Leaves glabrous above. 



Stems glabrous. L. burkei. 



Stems villous. L. wyethii. 



Leaves pubescent on both sides. 



Flowers nearly sessile, in long spike-like racemes; 



pubescence coarse and rather loose. L. leucophyllus. 



Flowers on well developed pedicels. 



Pubescence not silky; stems loosely retrorse- 



villous. L. retrorsus. 



Pubescence silky. 



Stems scape-like, simple, the leaves chiefly 



basal. 

 Leaflets 3 cm. long; pedicels loosely 



pubescent. L. piperi. 



Leaflets 4-5 cm. long; pedicels appressed- 



pubescent. L. hellerae. 



Stems leafy, usually branched above. 



Pubescence of stem loose and spreading. L. sericeus. 

 Pubescence of stem appressed. 



Bracts not exceeding the full grown 



buds. L. ornatus. 



Bracts exceeding the full grown buds. L. flexuosus. 



Lupinus sabinii Dougl. Stems tall, erect, sparsely pubescent, 60-120 cm. 

 high; leaflets 8-11, oblanceolate, acuminate, appressed-pubescent on both 

 sides with white hairs; petioles about as long as the leaflets; stipules subulate, 

 villous; raceme 15-30 cm. long; pedicels spreading, puberulent, 1 cm. long, 

 scarcely equalling the flowers; bracts setaceous, equalling the calyx, quickly 



