PEA FAMILY 249 



Leaflets glabrous or obscurely pubescent above, at least not silky; racemes 

 with the flowers scattered; banner glabrous; e. and n. of the north- 

 ern Sierra Nevada 14, L. saxosus. 



Leaflets silky-pubescent or silky-tomentose. 



Stems very leafy up to the racemes ; high montane. 



Banner glabrous ; racemes 6 to 7 lines wide; flower whorls usually 



many; central and northern Sierra Nevada 



15. L. meionanthus. 

 Banner silky on the back; racemes % to 1% inches wide; flower 



whorls 4 to 7; northern peaks 16. L. ornatus. 



Stems with the leaves chiefly basal or sub-basal (the proper stems short) ; 

 banner glabrous on the back or nearly so. 

 Largest leaflets 5 to 13 lines wide ; local in the Coastal Eanges. 



Leaflets retuse or truncatish, the pubescence silky above, below, 

 and on the margins ; St. Helena and Mayacamas ranges.. 



17. L. sericatus. 

 Leaflets obtuse or subacute, the pubescence finely short-silky, the 



margins hirsute-ciliate; Santa Lucia Mts 



18. L. cervinus. 

 Largest leaflets 2 to 5 (or 6) lines wide. 



Flowers 6 to 7 lines long; peduncles 2 to 4^^ inches long; Sierra 



Nevada, west slope 19. L. grayi. 



Flowers 8 to 8V^ lines long; peduncles about 1 foot long; desert 

 species (Inyo Co.) 20. L. magnificus. 



b. Apex of banner usually not much reflexed from tips of wings, the corolla therefore not appear- 

 ing as if notched at apex or scarcely so ; median groove of banner usually deep, 

 covering the edges of the wings. 



Plants not matted; keel more or less ciliate. 



Stems diffuse or decumbent, simple, few-leaved, few-flowered, bearing dwarf branchlets in 

 the primary leaf -axils ; low or dwarfish plants 4 to 9 inches high ; far northern Cal. 



21. L. onustus. 

 Stems erect or ascending, more or less branching ; dwarf branchlets none ; banner more or 

 less pubescent on back. 

 Calyx-cup spurred or gibbous; Sierra Nevada and Great Basin. 



Calyx about y^ to % as long as petals; spur or sac 14 to V2 line long; herbage 



greenish, pubescent 22. L. laxiflorus. 



Calyx about V^ to % as long as petals; spur 1 line long; herbage silvery 



23. L. caudatus. 



Calyx -cup not spurred or gibbous; w. San Luis Obispo Co 24. L. ludovicianus. 



Plants forming broad flat mats, the peduncles and racemes less than 6 inches high ; high montane. 



25. L. ireweri. 



2. Pedicels stout, short, usually % to lYz lines long; bracts usually persistent or tardily decidu- 

 ous; racemes suispicate with flowers usually crowded; Tceel ciliate. 



Banner glabrous. 



Largest leaves usually basal, long-petioled ; leaflets mostly 3 to 12 lines long; montane or 

 high montane, mostly Sierra Nevada. 

 Eacemes short-cylindric or subcapitate, rarely more than twice as long as wide; pe- 

 duncles and leaves basal or sub-basal, the peduncles usually curved or bent, 



spreading or decumbent 26. L. lyallii. 



Racemes cylindric or elongated-cylindric, usually more than twice as long as wide ; pe- 

 duncles borne on leafy stems, the proper stems often very short....27. L. lepidus. 

 Largest leaves mainly cauline, mostly short-petioled ; leaflets mostly l^/^ to 4 inches long, 

 narrow, acute. 

 Herbage with minute and closely appressed pubescence ; peduncles elongated, surpassing 

 the uppermost leases; bracts and braetlets lanceolate; w. Inyo Co. or near its 



west borders 28. L. pratensis. 



Herbage with long loose largely spreading hairs; peduncles short, not surpassing the 

 uppermost leaves ; bracts and braetlets linear or filiform ; Sierra Nevada, west 



slope 29. L. covillei. 



Banner pubescent on the back ; leaflets mostly 1 to 8 inches long. 



Leaflets obtuse ; herbage finely and closely silky 30. L. peirsonii. 



Leaflets acute; herbage white with shaggy-sericeous hairs 31. L. leucophyllus. 



