248 University of California Publications in Botany [Vol.9 



31. LEGUMINOSAE (Pulse Family) 



Leaves digitate. 



Leaves trifoliate; flowers in heads; anthers uniform 1. Trifolium 



Leaves not trifoliate; flowers in racemes; anthers dimorphic 2. Lupinus 



Leaves pinnate. 



Flowers in umbels; pods linear, never inflated 3. Hosackia 



Flowers in racemes; pods broad and usually more or less inflated. 4. Astragalus 



1. TRIFOLIUM 



Heads involucrate; flowers white with dark purple centers 1. T. monanthum 



Heads naked; flowers reddish or purple. 



Plants almost glabrous; flowers at length reflexed. 



Ehachis produced as a spur above the head of the nearly sessile, numerous 



(7-12) flowers 2. T. Kingii 



Ehachis not produced above the few-flowered (3-4) head of pedicelled 



flowers 3. T. Bolanderi 



Plant pubescent; flowers always erect 4. T. longipes 



1. Trifolium monanthum Gray, Proc. Am. Acad., vol. 6, p. 523. 

 1866. 



Type locality. — ** Moist bank by soda springs, Tuolumne River, 

 alt. 8,700 feet." 



Range. — Sierra Nevada. 



Zone. — Canadian to Arctic-alpine. 



Specimens examined — Slide Mountain, Washoe County, Nevada, 

 7,600 feet. Heller 10200 ; Snow Valley, Ormsby County, Nevada, 2,460- 

 2,615 m., Baker 1282; Mt. Rose, 10,000 feet, Kennedy 995; Soda 

 Springs, Nevada County, M. E. Jones 57 ; Yuba Pass, Sierra Count}^ 

 6,500 feet, Hall and Babcock 4484; Pyramid Peak, base of east side, 

 9,300 feet. Smiley 88a; Twin Lakes, Alpine County, 8,500 feet, Han- 

 sen 351 ; Tuolumne meadows, Yosemite, 8,600 feet, R. A. Ware 2654c, 

 2631c; soda springs of the Tuolumne, 8,700 feet. Brewer 1704; 

 Tuolumne meadows, foot of Lambert's Dome, 8,600 feet. Smiley 757; 

 base of Mt. Dana, Chesnut and Drew, July 16, 1889 ; Dana-Gibbs 

 divide, above Yosemite, 11,800 feet, Hall and Babcock 3624; meadows 

 near Black Mountain, Fresno County, 10,000 feet, Hall and Chandler 

 613*; Summit Lake, Tulare County, Culbertson (B 4344) ; Hockett's 

 meadows, Tulare County, Culbertson (B4457); Mineral King, 2750 

 m., Coville and Funston 1473 ; Independence Lake, Sierra County, 

 7,000 feet, Hall and Babcock 4543.* 



* These collections represent T. monanthum f. spatiosum McDermott (Eev. N. 

 Am. Trifolium, p. 98. 1910), differing from the type form in lengthened calyx 

 teeth. 



