BUTTERCUP FAMILY 543 



folia caulina profunde 3-fid, vel 3-foliolata foliolatis lanceolatis integris, vel 

 simplex et lanceolata ; carpella tenuissima, rostris aequalibus vel longioribus. ) 

 Marble Mt., western Siskiyou Co., Chandler (type). 



19. R. hebecarpus H. & A. Slender delicate annual herb, 5 to 12 inches 

 high, branching, sparsely villous; leaves thin, round or reniform in outline, 

 3-parted or -divided, the divisions somewhat divergent, entire, notched or lobed, 

 or the uppermost divided into 3 narrowly oblong acute segments ; peduncles 3 to 

 9 lines long ; flowers minute, pale yellow ; petals early deciduous, commonly before 

 the stamens ; achenes few, hispidulous with hooked hairs, orbicular, flat, 1 line 

 long, tipped with a short curved beak. 



Common in thQ foothills and sometimes in the valleys, in the shade of oak 

 and other trees : frequent in the Coast Ranges ; Sacramento Valley ; Sierra 

 Nevada ; Southern California near the coast. South into Lower California, north 

 to Washington. 



Locs. San Diego, W. S. Wright 136; Santa Catalina Isl. (Zoe, 1:131); Garvanza, Los 

 Angeles Co., Greata; Ft. Tejon, Davy 2338; Los Gatos, Heller 7302; Boss Valley, Marin Co., 

 Jepson; Araquipa Hills, Solano Co., Jepson; Scotts Valley, Lake Co., Tracy 1703; Capay, 

 Yolo Co., Blankinship ; College City, Alice King; Yreka, Butler; Modoc Co., R. M. Austin; 

 Auburn, Bolander 4510; Angels Camp, Davy 1475. 



Refs. KANUNCULUS HEBECARPUS H. & A. Bot. Beech. 316 (1840), type from California, 

 Douglas; Jepson, Fl. W. Mid. Cal. 201 (1901). Var. pusillus Brew. Bot. CaL 1:9 (1876), 

 2:426 (1880), a depahperate form. 



20. R. muricatus L. Annual; stems stout, 3 to 10 inches high; herbage 

 yellowish green, somewhat succulent, glabrous ; leaves roundish or reniform, % 

 to 2 inches broad, coarsely toothed and commonly 3-cleft; flowers 3 to 7 lines 

 broad; petals 5 (or 3) ; achenes 4 lines long, including the stout ensiform beak, 

 the sides very flat, surrounded by a conspicuous raised smooth border and 

 coarsely muricate or prickly. 



Low places in valley fields: naturalized from Europe, widely scattered in 

 central and northern California, but not common. 



Locs. Eureka, Tracy 3185; Hamilton City, Hall; Sonoma Valley, Jepson 4189; Angel 

 Isl., Davy 6906; San Francisco, Jepson; Donner Canon, Mt. Diablo, Jepson 7593; Milpitas, 

 R. J. Smith; Saratoga (Zoe, 2:128) ; Knights Ferry, F. W. Bancroft; Quartz, Tuolumne Co., 

 A. L. Grant; New York Ravine, El Dorado Co., K. Brandegee. 



Eefs. RANUNCULUS MURICATUS L. Sp. PI. 555 (1753), type European; Jepson, Fl. W. 

 Mid. Cal. 201 (1901). 



21. R. arvensis L. HUNGER- WEED. Erect annual, 1 to V/ 2 feet high ; lower 

 leaves with three broad coarsely crenate lobes, the upper 2 or 3 times divided 

 into narrow acute segments ; achenes spiny-tuberculate on the raised margin as 

 well as on the sides. 



Introduced from Europe. Mariposa Co. 



Lac, Mt. Bullion, S. J. Johns, in 1915; seed sent from Potter Valley in 1919 through 

 P. I>. Kennedy. 



Ref. RANUNCULUS ARVENSIS L. Sp. PI. 555 (1753), type European. 



22. R. andersonii Gray. Perennial with the scapes and leaves from a stout- 

 ish rootstock; herbage glabrous; scapes naked, 4 to 9 inches high, 1-flowered; 

 leaves of rounded outline, palmately twice or thrice dissected into oblong or 

 linear segments ; segments acute, 2 to 4 lines long ; flowers 12 to 14 lines broad ; 

 sepals and petals withering-persistent; sepals round-ovate, purplish-margined; 

 petals rose color or pink, roundish, with short narrow claw and a pocket-like 

 pit near the base of the blade ; achenes numerous, strongly utricular, 3 to 4 lines 

 long, the beak very short. 



Great Basin region from Oregon to Arizona, entering California in Modoc 

 and Mono cos. 



Locs. Jess Valley, Modoc Co., L. S. Smith. Jupiter Mt., Malheur Co., Ore., Cusick 2371; 



