290 



LEGUMINOSAE 



de los Angeles", Gambcl. Var. flavulum Jepson, Fl. W. Mid. Cal. 310 (1901), Man. 537. T. fla- 

 vulum Greene, Pitt. 2:223 (1892), type loc. w. Cal. T. fucatum var. gambelii f. flavulum McDer. 

 I.e. 158, pi. 60; Jepson, FI. W. Mid. Cal. ed. 2, 223 (1911). 



2. T. amplectens T. & G. Bladder Clover. (Fig. 192.) Stems commonly 

 several or many from the base, rather stout, decumbent or ascending, 6 to 15 inches 

 high; herbage glabrous; leaflets obovate to oblanceolate, emarginate to truncate, 

 cuneate at base, serrate, ^4 to % inches long; 

 stipules broadly ovate or obovate, acuminate, 

 searious-margined; heads 4 to 11-flowered; in- 

 volucre 6 or 7-lobed, the lobes rounded to ob- 

 long, searious-margined, entire or occasionally 

 toothed, equaling or exceeding the calyx-teeth; 

 corolla white or purple, inflated; pods 3 to 8- 

 seeded. 



Rich soil of low plains and foothills, 5 to 

 2300 feet: Great Valley; Coast Ranges from 

 Lake Co. to San Luis Obispo Co. ; coastal South- 

 ern California. Mar.-]\Iay. 



Fig. 192. Trifolium amplectens 

 T. & G. a, habit, X % ; 6, involucre, 

 X 3 ; c, fl., X 3. 



Locs. — The type of Trifolium amplectens T. & G. is 



a plant ■n'ith cuneate-obovate leaflets ; this form of it is 



somewhat uncommon. The type of T. stenophyllum 



Nutt. is a plant having linear leaflets, examples of 



which are common. Plants with intermediate forms of 



foliage are, however, more numerous than the extremes 



represented by the types of these two forms. There are 



no other constant differences between them. We cite 



the following, with every gradation of leaflet shape 



from obovate to oblanceolate or linear-oblanceolate and 



linear. Great Valley: Corning, Tehama Co., BlanMn- 



ship; Folsom, ne. Sacramento Co., Jepson 15,745; Vaca- 



vilie, Jepson 13,734; Clements, San Joaquin Co., Jepson 



15,204; Byron, Greene; Lone Willows sta., Fresno Co., 



Jepson 11,584; WideaAvake ranch, Madera Co., Jepson 



15,151; Visalia, E. B. Homer. Coast Eanges: Kelsey- 



ville. Lake Co., Irwin 62 ; Calistoga, Jepson 13,723 ; Conn 



Valley, Napa Eange, Jepson 6244; Vallejo, BlanMnship ; 



Mill Valley, Marin Co., Tidestrom; Oakland Hills, Jepson 6867; Lafayette, Contra Costa Co., 

 Tidestrom; Carmel, Newlon 107; Cuesta Pass, Santa Lucia Mts., Jepson 11,960; Morro Creek, 

 San Luis Obispo Co., Peirson 5668. S. Cal.: Santa Cruz Isl., T. Brandegee ; Santa Catalina Isl. 

 (Erythea 7:144) ; Stonewall Mine, San Diego Co., Parish 4417; Cuyamaca Lake, Peirson 5972; 

 La Jolla, San Diego Co., Jepson 11,847, 11,848; San Diego, Jepson 6665, 6676. 



Var. diversifolium Jepson. Heads many (8 to 15) -flowered; involucre very small, 6 to 9- 

 lobed, the lobes % line long. — Salt marshes and alkaline areas, 5 to 120 feet: Colusa jet., Colusa 

 Co., K. Brandegee ; Alameda, Tidestrom ; Alviso, Santa Clara Co., Bioletti; San Luis Obispo, 

 Summers. 



Var. truncatum Jepson. Leaflets % to 1 inch long; heads with the flowers in 2 whorls (rarely 

 1), the Inner whorl subtended by a very small involucral ring. — ^Plains and valley floors, 5 to 

 200 feet: Great Valley; Contra Costa and Alameda Cos. 



Locs. — Great Valley: Ked Bluff, Jepson 13,730 ; Marysville, Heller 7564; College City, Colusa 

 Co., Alice King ; Sacramento, Bolander 4502; Vacaville, Jepson 13,732; Caliente, Kem Co., Hel- 

 ler 7620. Contra Costa and Alameda Cos.: Antioch, Davy 993; Oakland (Temescal), Davy; 

 Livermore Valley, Jepson 13,731. 



Eefs. — Trifolium amplectens T. & G. Fl. 1:319 (1838), type from Cal., Douglas; Jepson, 

 Fl. W. Mid. Cal. 311 (1901), Man. 537 (1925). T. depauperatum var. amplectens McDer. N. Am. 

 Sp. Trifolium 142 (1910) ; Jepson, Fl. W. Mid. Cal. ed. 2, 223 (1911). T. stenophyllum Nutt. 

 Jour. Acad. Phila. n. ser. 1:151 (1847), type loc. Santa Catalina Isl., Gamhel. T. depauperatum 

 var. stenophyllum McDer. I.e. 137 ; Jepson, Fl. W. Mid. Cal. ed. 2, 223 (1911) . T. amplectens var. 

 stenophyllum Jepson, Man. 537 (1925). T. franciscanum Greene, Man. Eeg. S. F. Bay 100 

 (1894), type loc. San Francisco. T. depauperatum var. stenophyllum f. franciscanum McDer. I.e. 

 140; Jepson, I.e. T. anodon Greene, Pitt. 5:107 (1903), type loc. San Diego, T. Brandegee 828. 

 T. brachyodon Greene, I.e., type loc. Santa Catalina Isl., TrasTc. T. decodon Greene, I.e. 108, type 

 loc. San Diego, T. Brandegee 3371. Var. diversifolium Jepson, Man. 537 (1925). T. diversi- 



