PEA FAMILY 



293 



throughout ; leaflets obovate-oblanceolate or oblaneeolate, obtuse or acute, f ringed- 

 serrate, Y-L to 11/2 (or 2) inches long; stipules laciniately toothed; peduncles 1 to 3 

 inches long; heads large, % to l^/^ inches wide; involucres 7 to 9 lines wide, laci- 

 niately divided from % to i/^ its length, the numerous acicular divisions often 

 toothed near the base; flowers 6 to 8 lines long; calyx-tube 10 to many-nerved, the 

 teeth entire (rarely tridentate), dilated near the base; corolla white with a bright 

 purple spot at the center, much exceeding the calyx; pods 2-seeded. 



Moist swales or creek bottoms, 300 to 4250 feet : throughout cismontane Cali- 

 fornia but not abundant. North to southwestern Oregon. June-July. 



Native uses. — Both in the Sierra Nevada of Fresno 

 Co. and in the North Coast Ranges, the green herbage 

 of this species is used as food by members of the 

 native tribes. On account of its acid or salty taste 

 it is called Salt Clover or Sour Clover. Cattle are fond 

 of it and follow the little creeks where it grows, crop- 

 ping it closely. It is also called Spring Clover. 



Locs. — Coastal S. Cal. : Cedar Canon betw. El Nido 

 and Dulzura, Forbes; Palomar Mt., Jepson 1533; San 

 Bernardino, Parish. Coast Eanges: San Miguelito 

 Eancho, Santa Lucia Mts., Jepson 1634; Miller Canon, 

 Vaca Mts., Jepson 13,689; Hough Sprs., n. Lake Co., 

 Jepson 9011; Wise Creek, s. Mendocino Co., Jepson 

 9291 ; Fort Bragg, W. C. Mathews 91 ; Hupa, Chandler 

 1322. Great Valley: Visalia, Greene. Sierra Nevada: 

 Pine Ridge, Fresno Co.; Hetch-Hetchy, Jepson 3423; 

 Angels Camp, Jepson 10,424; North Fork Calaveras 

 River n. of San Andreas, Jepson 9942; Table Mt., n. 

 of Oroville, Heller 10,771. 



Refs. — Trifolium obtusifloeum Hook. Ic. PI. t. 

 281 (1840), type loc. near Monterey, Douglas; McDer. 

 N. Am. Sp. Trifolium 30, pi. 5 (in part), 8, 9 (1910) ; 

 Jepson, Fl. W. Mid. Cal. 309 (1901), ed. 2, 224 (1911), 

 Man. 538 (1925). T. tridentatum var. obtusiflorum 

 Wats. Proc. Am. Acad. 11:130 (1876). T. roscidum 

 Greene, Fl. Fr. 31 (1891), type loc. Sierra Nevada foot- 

 hills (Jackson, Amador Co.). T. ma jus Greene, Pitt. 

 3:214 (1897), herbage resinous-glandular. 



Fig. 193. Trifolium obtusiflorum 

 Hook, a, branchlet, X % ; b, involucre, 

 X 1 ; c, fl., X 1% ; d, calyx spread open, 



X 11/2. 



6. T. wormskjoldii Lehm. Cow Clover. 

 Stems thick but flaccid, low-caespitose or tall 

 (4 to 24 inches high) ; herbage strictly gla- 

 brous ; petioles long ; small leaflets obcordate or obtuse-oblanceolate, about 2 to 3 

 lines long ; large leaflets oblong, ovate, obovate or rhombic-oblanceolate, serrulate- 

 setate, mostly obtuse, about 5 to 14 lines long; stipules laciniate; heads large, showy, 

 % to 1% inches broad, each whorl often suljtended by a secondary involucre; in- 

 volucre deeply or slightly lobed, each lobe 3 to 5-toothed ; calyx 10-nerved ; corolla 

 purple, rose-red or pinkish, lighter at the top ; pods 2 to 6-seeded. 



Frequent along streams, by springs or in salt marshes, 10 to 8000 feet : through- 

 out California from the coasts to the deserts and in the mountains, but not on the 

 dry plains of the Great Valley. East to the Rocky Mts., south to Mexico. Apr.-July. 



Locs. — East of the Sierra Nevada crest: Crowder Flat, Warner Range, L. S. Smith 1183; 

 Walker Lake, Mono Co., Jepson 4445 ; Wells ranch ranger sta., Inyo Co., Kennedy. Sierra Ne- 

 vada: Morley sta., Shasta Co., M. S. Baker; Prattville, Piatt; Bear Valley, Nevada Co., Jepson 

 13,651; Confidence, Tuolumne Co., Jepson 7698; Brightman Flat, Tuolumne Co., A. L. Grant 899; 

 Huckleberry Creek, Huntington Lake, Jepson 13,069; Arnold Mdw., Fresno Co., A. L. Grant 

 1389, Delta region: Denverton, Solano Co., Jepson 13,653. Coast Ranges: Yreka, Butler 381; 

 Korbel to Angels ranch, n. Humboldt Co., Jepson 1934; Little River beach, Humboldt Co., Tracy 

 4801; Shelter Cove, sw. Humboldt Co., Tracy 4991; DeHaven to Ft. Bragg, Jepson 13,652; 

 Howell Mt., Jepson 13,654; South Los Guilicos, Sonoma Co., Bioletti; North Berkeley Hills, Jep- 

 son 9671; Mt. Diablo, Jepson 13,655; San Jose, Battan; Ano Nuevo Pt., San Mateo Co., Cooper 

 205; Carmel, Newlon 113. S. Cal.: Rock Creek, San Gabriel Mts., Peirson 485; San Bernardino 

 Valley, Parish; Tustin, Orange Co., Alice King; San Diego, T. Brandegee. 



