LEGUMINOS^:. (PULSK FAMILY.) 53 



pnrplo ; the standard orbicular. — From N. W. Wyomiiijj to W.-whinpton and 

 California. 



4. Ij, Lyallii, (Jray. Sttms fi um a sjn-eadlwi uo<,<ly raudn : pul)escence 

 dense, villous, apijressed : leaflets obovate : ranuies rtry short, the jtrdimcUf 

 Ttinrh exceed! itfj the leares ; bracts short : jtet.als purple; tbe*stau<lanl elliptical. 



— Proc. Aui. Arad. vi. ;3.'34. Hitter Root Mountains, ami in the Cancadea of 

 Washington. 



* * Stems taller, erect or asceudiurj, and racemf^s elongated. 

 -»- Floiri r.< lart/e : leaflets 7 to 10, (jiahrous above or nearly so : ovules 5 to 8. 



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

 oppressed: lower leaves long-petioled ; leaflets about e(|ualling the petifdes: 

 raceme usually shnrt and dense; bracts villous: flowers [)urple or souiftiincs 

 white : calyx with spreadinej pubescence : keel nearly semicircular : pod S-seeded. 



— Proc. Am. Acad. viii. .525. L. poli/phyllus, of Bot. Kin;;'s Kxp. and llayd. 

 Rep. 1871 and 1872. Head-waters of Yellowstc^ne and Snake Rivers, to 

 N". Nevada. 



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

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

 dard rounded, naked : oimles 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-cillous throughout, trilh a some- 

 ivhat glaucous hue : leaflets spatulate : raceme loose, shortly peduncled : petals 

 pale blue, with a conspicuous darker spot upon the, standard. — Proc. Am. Aca<l. 

 xvii. 369. L. ornatus, Dougl., var. glahralus, Watson. The L. ornatus of the 

 Hay den Reports. Common on the Upper Platte and northward. 



■^ -I- Flowers smaller (.3 /o 5 lines long) : ovules 2 to 6. 

 H-*. Lower pefiohs elongated: leaflets not glabrous alx)ve : racemes mostly dense. 



8. L. leucophyUus, Dougl. Leafy, den.^sely silky-tomentose throughout 

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

 upper petioles about equalling the leaves: racemes se.ssile or nearly so, densely 

 flowered: pedicels stout: petals blue or pir.k ; the stiuidard densely villous. 



— Head-waters of the Platte and Missouri Rivers, to W:isliington and N. 

 California. 



++ ■*♦ Stems slender: pubescence short, silky, appres.fed: petioles and ftrduncUs 

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



9. L. parviflorus, Nutt. Stems 2 or .3 feet high : pultescence scant g, the 

 calyx and pcMljccls silky: leaflets 5 to \ I, oblanceolate to o^ orate, glabrous aUtv* , 

 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 Colniniiia River. 



10. L. laxiflorus, Dougl. Stems 1 to 2 feet high: leafl'ts to 8, nar- 

 rowly oblanceolate, silky on Imlh sid<s,at least half as long as the fntn>its: calyx 

 narrowed and .saccate at ba.<;e: standard somewhat pulwscent. — Was:itch Moun- 

 tains, westward to N. California and Vancouver Island. 



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

 feet hi;,^h : leaflets 5 to 8, linear-lanceolate, smooth altove or nrarlif so, al-out npial- 

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



