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. Brewer! 



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 with 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 (Rev., p. 250. 1910). 



