LEGUMINOS^E. (PULSE FAMILY.) 53 



purple ; the standard orbicular. From N. W. Wyoming to Washington Ter- 

 ritory and California. 



4. L. Lyallii, Gray. Stems from a spreading woody caudex : pubescence 

 dense, villous, appressed : leaflets obovate : racemes very short, the peduncles 

 much exceeding the leaves ; bracts short : petals purple ; the standard elliptical. 



Proc. Am. Acad. vi. 334. Bitter Root Mountains, and in the Cascades of 

 Washington Territory. 



* * Stems taller, erect or ascending, and racemes elongated. 

 H Flowers large : lea/lets 7 to 10, glabrous above or nearly so : ovules 5 to 8. 



5. L. Burkei, Watson. Stout, erect, the short and silky pubescence closely 

 appressed: lower leaves long-petioled ; leaflets about equalling the petioles: 

 raceme usually short and dense ; bracts villous : flowers purple or sometimes 

 white : calyx with spreading pubescence : keel nearly semicircular : pod 8-seeded. 



Proc. Am. Acad. viii. 525. L. polyi>hyllus, of Bot. King's Exp. and Hayd. 

 Rep. 1871 and 1872. Head-waters of Yellowstone and Snake Rivers, to 

 N. Nevada. 



6. L. Sitgreavesii, Watson. Puberulent and somewhat silky villous with 

 spreading hairs: raceme open, shortly peduncled : calyx appressed-silky : stan- 

 dard rounded, naked : ovules 5. Proc. Am. Acad. viii. 527. In the mountains 

 from the S. Sierra Nevada to S. Colorado and New Mexico. 



7. L. Plattensis, Watson. Appressed silky -villons throughout, with a some- 

 what glaucous hue : leaflets spatulate : raceme loose, shortly peduneled : petals 

 pale blue, with a conspicuous darker spot upon the standard. Proc. Am. Acad. 

 xvii. 369. L. ornatus, Bougl., var. glabratus, Watson. The L. ornatus of the 

 Hayden Reports. Common on the Upper Platte and northward. 



<- -i- Flowers smaller (3 to 5 lines long) : ovules 2 to 6. 

 w- Lower petio'es elongated: Icajlets not glabrous above: racemes mostly dense. 



8. L. leucophyllus, Dougl. Leafy, densely silky-tomentose throughout 

 and somewhat villous : leaflets 7 to 10, oblanceolate or cuneate-oblong ; the 

 upper petioles about equalling the leaves : racemes sessile or nearly so, densely 

 flowered : pedicels stout : petals blue or pink ; the standard densely villous. 



Head-waters of the Platte and Missouri Rivers, to Washington Territory 

 and N. California. 



w- -H- Stems slender: pubescence short, silky, appressed: petioles and peduncles 

 mostly short : flowers subverticillate or scattered, on short slender pedicels. 



9. L. parviflOPUS, Nutt. Stems 2 or 3 feet high : pubescence scanty, the 

 calyx and pedicels silky: leaflets 5 to 11, oblanceolate to obovate, glabrous above, 

 the lower leaves shorter than the petioles : standard naked. Mountains of Central 

 Colorado, to the sources of Snake River, and westward to Central California 

 and the Columbia River. 



10. L. laxiflorus, Dougl. Stems 1 to 2 feet high : leaflets 6 to 8, nar- 

 rowly oblanceolate, silky on both sides, at least half as long as the petioles : calyx 

 narrowed and saccate at base : standard somewhat pubescent. Wahsatch Moun- 

 tains, westward to N. California and Vancouver Island. 



11. L. argenteus, Pursh. Hoary with thick pubescence: stem 1 to 2 

 feet high : leaflets 5 to 8, linear -lanceolate, smooth above or nearly so, about equal- 

 ling the petioles : calyx gibbous but not spurred at base : petals blue or cream- 



