PEA FAMILY 



289 



marked species making on the whole, in view of its range and tolerance of various soils, com- 

 paratively unimportant exhibition of variability, except rn the calyx-teeth. The calyx-teeth are 

 somewhat variable in number and in development, but the character of the variation is more 

 or less indefinite and the named varieties are not sharply differentiated. 



Sometimes the leaflets exhibit color markings such as silvery white, faint rose, brown or 

 shades of black, imposed upon the foundation green in the form of designs which are extremely 

 variable in outline. For example we may find a strain at a given station, as in the Diablo Eange, 

 uniformly exhibiting leaflets with a narrow irregular transverse whitish band midway of the leaf- 

 lets. Or again, as in a field at Suisun, each individual has its own leaf pattern, no two being alike. 

 In seasons of average precipitation T. fucatum develops abundantly a rank growth in its 

 favored areas. Frequently it is common along country lanes, but doubtless because the lanes are 



often preserves of the primitive vege- 

 tation and have been little changed 

 by industrialism. The plant has been 

 called Sour Clover, but wrongly, its 

 herbage and flowers furnishing a sweet 

 salad. It is also called Farded Clover. 

 Locs. — Coastal S. Cal. : San Ber- 

 nardino, Parish. Coast Ranges : Diablo 

 Range, sw. Fresno Co., Jepson 15,397 ; 

 Mt. Diablo, Jepson 9857; West Berke- 

 ley, Tidestrom; Suisun, Jepson 9621; 

 Conn Valley, Napa Range, Jepson 6256. 

 Great Valley : Vacaville, Jepson 13,715 ; 

 Willows, Glenn Co., Jepson 13,717; 

 Sutter plains, Jepson 13,714. 



Var. virescens Jepson. Smaller; 

 leaflets spatulate, pectinate to pecti- 

 nate-dentate ; calyx-teeth reduced to 3, 

 longer than the calyx-tube; pod 3- 

 seeded. — Dry hills or moist valleys, 5 to 

 1400 feet : mostly North Coast Ranges. 

 Locs. — Rutherford, Napa Valley, 

 Jepson 13,742; Calistoga, Jepson 13,- 

 722 ; Cannon sta., Solano Co., Jepson 

 6789; Fort Bragg, Mathews 1; Red- 

 ding, BlanTcinship ; BridgeviUe, Hum- 

 boldt Co., Tracy 6203; Morleys sta., 

 Shasta Co., BaTcer 4" Nutting. 



Var. gambelii Jepson. Procumbent 

 and very succulent; leaflets rhombic, 

 thick, glaucous; calyx -teeth 5, very 

 long, 2 to 3-cleft. — Coastal Southern 

 California ; South Coast Ranges. 



Locs. — Los Angeles, E. B. Palmer; 

 near Gaviota Pass, Santa Barbara Co., 

 Brewer 393 ; Estrella, San Luis Obispo 

 Co., Jared; Danville, Contra Costa Co., 

 Davy. 



Var. flavulum Jepson. Procum- 

 bent as in var. gambelii ; leaflets small, 

 rotund-obovate ; calyx -teeth 5, simple, 

 equaling or exceeding the calyx -tube. — 

 Coastal region, 5 to 1400 feet: San 

 Diego Co. to Lake Co. 

 Locs. — San Diego, K. Brandegee; Puente Hills, s. Los Angeles Co., Johnston 1895; Morro, 

 San Luis Obispo Co., Barber; Saratoga, Santa Clara Co., Pendleton 337; West Berkeley, Tide- 

 strom; Wild Cat Creek, Berkeley Hills, Jepson 13,720; St. Helena, Jepson 13,719; Vacaville, 

 Jepson 13,718; Lakeport, Tracy 5521. 



Refs. — Trifolium fucatum Lindl. Bot. Reg. t. 1883 (1836), type cult., seeds from Cal., 

 Douglas; Jepson, Fl. W. Mid. Cal. 310 (1901), ed. 2, 223 (1911), Man. 537, fig. 524 (1925); 

 McDer. N. Am. Sp. Trifolium 147, pis. 54-56 (1910), T. physopetalum F. & M. Ind. Sem. Petrop. 

 3:47 (1836), type loe. Bodega Bay. Var. virescens Jepson, Fl. W. Mid. Cal. 311 (1901), Man. 

 537. T. virescens Greene, Pitt. 2:223 (1892), type loc. Marin and Sonoma Cos. T. fucatum f, 

 virescens McDer. I.e. 152, pi. 57; Jepson, Fl. W. Mid. Cal. ed. 2, 223 (1911). Var. gambelii Jep- 

 son, Fl. W. Mid. Cal. 311 (1901),ed. 2, 223 (1911), Man. 537; McDer. I.e. 155, pis. 58, 59. T. gam- 

 belii Nutt. Jour. Acad. Phila. n. ser. 1:151 (1848), "Island of Catalina, St. Simeon and Pueblo 



Fig. 191. Trifolium fucatum Lindl. a, flowering 

 branchlet, X % ; 6, fl., X 2 ; c, calyx spread open, X 6. 



