250 University of California Publications in Botany [Vol.9 



4. Trifolium longipes Nutt. in T. and G., Fl., vol. 1, p. 314. 1838. 

 T. caurinum Piper, Erythea, vol. 6, p. 29. 1898. 



Type locality. — "Valleys of the central chain of the Rocky Moun- 

 tains range, and on the moist plains of the Oregon as low as the 

 Wahlamet." 



Range. — British Columbia to Alberta, south to Mexico and Lower 

 California. 



Zone. — Transition and Canadian. 



Specimens examined. — Webber Valley, Lemmon 1223 ; north side 

 of Slide Mountain, Washoe County, Nevada, 7,700 feet. Heller 10947 ; 

 Carson Spur, Alpine County, Hansen 349 ; Summit, Kellogg, July, 

 1883; Silver Valley, 7,351 feet. Brewer 1971; Mono Pass, Bolander 

 6288; Silver Lake, Amador County, 8,000 feet, Hansen 352, 745*; 

 Bonita meadows, Tulare County, 8,500 feet. Hall and Babcock 5187 ; 

 Golden Trout Creek, Tulare County, 8,900 feet, Hall and Babcock 

 8416. 



2. LUPINUS 

 Dwarf caespitose plants. 

 Stems wholly herbaceous. 



Pubescence dense and shaggy; flowers small 1. L. Lobbii 



Pubescence sericeous, the hairs more appressed; flowers larger. 



The few flowers in short (1.5-2 inches) rather loose spicate racemes. 



2. L. Culbertsonii 



The many flowers in longer (3-4 inches), densely flowered spicate 



racemes 3. L. sellulus 



Stems woody at base. 



Leaflets obtuse, 7-10; peduncles short 4. L. Breweri 



Leaflets acute, 4-7; peduncles elongated 5. L. danaus 



Large herbaceous plants with 1 or few stems, not caespitose. 

 Calyx symmetrical or nearly so. 



Some of the leaflets 2 inches or longer. 



Foliage deep green, nearly glabrous; racemes long and loose; plant of 



wet places 6. L. longipes 



Foliage grayish with long shaggy hairs; leaflets very narrow, acute, 



somewhat falcate 7. L. Covillei 



All leaflets less than 2 inches long. 



Leaflets distinctly obtuse and usually broadly lanceolate; pubescence 



tawny 8. L. obtusilobus 



Leaflets acute; pubescence white. 



Pubescence sparse; petioles longer than the leaflets; keel very strongly 



falcate and naked 9. L. albicaulis 



Pubescence dense, silvery; petioles mostly shorter than the leaflets; 

 keel arcuate but not strongly curved, ciliolate ..10. L. meionanthus 

 Calyx spurred or saccate at base. 



Spur of calyx produced, the upper lip white at tip; plants densely silvery- 

 silky 11. L. calcaratus 



Spur of the uniformly colored calyx short and broad; plants green, the 

 pubescence sparse and appressed 12. L. laxiflorus 



« 



While the usual color for this species is purplish, there appears to be present 

 in Amador County a local race witli livid red flowers, which is represented among 

 the specimens cited by Hansen's collections from Silver Lake; Dr. Greene described 

 this as T. Hanseni (Erythea, vol. 3, p. 17. 1895), while Miss McDermottus con- 

 siders it merely a form, f. Hanseni McDermott (Eev., p. 250. 1910). 



