274 LEGUMINOSAE (PEA FAMILY) 



setaceous or subulate; leaflets 7-10, oblanceolate or cuneate-oblong, 3-6 dm. 

 long, acute; the petioles about equaling the leaves, or the lower twice as long: 

 raceme dense, 1.5-3 dm. long; bracts subulate or linear, about as long as the 

 calyx; flowers nearly sessile, scattered or subverticillate: upper calyx-lip 

 2-cleft; the lower slightly longer, subentire: petals blue or pink, equal, 8-10 

 mm. long; the standard densely villous; keel naked or ciliate: ovules 5-6. 

 This northwestern plant may reach our northwestern boundary. 



9. Lupinus ramosus E. Nels. Bot. Gaz. 30: 120. 1900. Stems several 

 from a woody caudex, 2-4 dm. high, divaricately simple-branched; pubescence 

 dense, of two kinds, finely lanate-canescent and sparsely villous with spread- 

 ing hairs: leaflets 5-8, oblanceolate, obtuse to acute, 2-4 cm. long, the lower 

 half the length of the petioles; the upper equaling them: racemes terminating 

 stem and branches, short-peduncled, 3-5 cm. long; bracts ovate-lanceolate; 

 flowers scattered or subverticillate : upper lip of calyx notched, a little shorter 

 than the lower: standard very silky on the back, with yellowish white center, 

 otherwise pale blue or lilac as are also the wings; keel pale, ciliate on the 

 margin below: pod silky, 3-5-seeded. Northwestern Wyoming. 



10. Lupinus flexuosus Lindl. in Agh. Syn. Lup. 34. 1835. Stems ascend- 

 ing or erect, often decumbent at base, 4-6 dm. high, branching; pubescence 

 short, silky, appressed or sub villous on the lower leaves: leaflets 6-8, ob- 

 lanceolate, 3^-4 cm. long, acute, silky on both sides: raceme 7-14 cm. long; 

 bracts equaling or exceeding the calyx; pedicels 4-5 mm. long: calyx-lips 

 subequal, subentire or the upper slightly toothed: petals blue or flesh-color, 

 equal, about 1 cm. long; the standard hairy, the keel ciliate: pods 2-3 cm. 

 long, 4-5-0 vuled. In the northern part of our range and west to Washing- 

 ton. 



11. Lupinus Greenei A. Nels. Stems tufted, erect or with decumbent 

 base, 3-5 dm. high, usually simple, whitened throughout with a dense silky 

 tomentum: leaflets 7-9, 3-5 cm. long, oblanceolate, obtuse, mucronulate, 

 shorter than the petioles: racemes short, the violet flowers in verticils; pedi- 

 cels equal: the standard and sometimes the wings villous along the midnerve 

 on the outside; keel short but falcate, subtomentose on the margin. L. oreo- 

 philus Greene, Pitt. 4: 135. 1900; not L. oreophilus Phil. Southern Colorado. 



12. Lupinus floribundus Greene, Proc. Acad. Phila. 364. (1892) 1893. 

 Stems tufted, simple with a terminal raceme, or branching above and the 

 racemes several, purplish, and sparsely strigulose: raceme long (1-2 dm.) 

 and slender, dense and the flowers very small: petioles slender; leaflets 7-9, 

 narrowly oblanceolate, acute, glabrous above, densely strigulose beneath and 

 on the margins: flowers violet or blue, in closely contiguous verticils; the early 

 deciduous bracts with attenuate and spreading tips; pedicels and calyx densely 

 villous: petals equal, 5 or 6 mm. long, the broad keel delicately ciliolate. 

 (L. myrianthus Greene, Pitt. 4: 134. 1900; L. leptostachyus Greene, PI. Baker. 

 3: 36. 1901.) Mountain valleys; western and southern Colorado. 



13. Lupinus parviflorus Nutt. Hook. & Arn. Bot. Beech. 336. 1839. Stems 

 erect, slender, 4-8 dm. high, simple or branched above; pubescence scanty, short 

 and appressed, the calyx and pedicels silky: stipules setaceous; leaves rather 

 distant; leaflets 5-11, broadly linear to oblanceolate, 3-5 cm. long, mostly 

 acute and mucronulate, glabrous above; the lower shorter than the petioles: 

 raceme 1-3 dm. long, slender; bracts linear-subulate, equaling the calyx: 

 flowers scattered or in verticils, on slender pedicels 2-4 mm. long: calyx-lips 

 nearly equal, the upper 2-toothed: petals blue, equal, 6-8 mm. long; the keel 

 ciliate or naked: pod pubescent, 2-4-seeded. (L. ingratus Greene, Pitt. 

 4: 133. 1900.) From New Mexico to Montana and west to Washington. 



. 14. Lupinus argenteus Pursh, Fl. Am. Sept. 468. 1814. Stems erect or as- 

 cending, slender and branching, 3-5 dm. high; pubescence minute, silvery ap- 

 pressed: stipules small; leaflets 5-8, linear-lanceolate, 3-5 cm. long, acute, 

 smooth above or nearly so, about as long as the petiole: racemes 5-15 cm. 

 long, nearly sessile; flowers in verticils or scattered: calyx campanulate, gib- 

 bous at base; the upper lip broad, 2-toothed; the lower subentire, slightly 

 longer: petals blue, cream-color, or even purplish; the standard and keel 



