BUTTERCUP FAMILY 543 



folia caulina prof untie 3-fid, vel 3-foliolata foliolatis lanceolatis integris, vel 

 simplex et lanceolata; carpella temiissinia, rostris ae(iiialibiis vel longioribus. ) 

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



19. R. hebecarpus II. & A. Slender delicate annual iieri), o 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 ; aehenes few, hispidulous with hooked hairs, orbicular, flat, 1 line 

 long, tipped with a short curved beak. 



Common in the 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. 



Lops. — Sau I)iego, If. .S'. WrigJit ISfi; Santa Catalina Is!. (Zoe, 1:131); Garvanza, Los 

 ABgeles Co., Greaia ; Ft. Tejon, Davy 2338; Los Gatos, Heller 7302; Boss Valley, Marin Co., 

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

 Yolo Co., Blaiikinshii) ; College City, Alice King; Yreka, Butler; Mo<;loc Co., R. M. AusUn; 

 Auburn, Bnhmder -lolO; Angels Camp, Davy 1475. 



Refs. — Ranunculus hebecarpus H. & A. Bot. Beech. 316 (1840), type from California, 

 Doufilax; Jepson, PI. W. Micl. Cal. 201 (1901). Var. pmillus Brew. Bot. Cal. 1:9 (1876), 

 2:426 (1880), a depauperate form. 



20. R. muricatus L. Annu;d ; stems stout, 3 to 10 inches liigh ; 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) ; aehenes 4 lines long, including the stout ensiform beak, 

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

 coarsel.v murieate 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. TV. Bancroft; Quartz, Tuolumne Co., 

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



Refs. — Ranunculus muric.^tus L. Sp. PI. 555 (1753), tvpe European; Jepson, Fl. W. 

 Mid. Cal. 201 (1901). 



21. R. arvensis L. Hunger-weed. Erect annual, 1 to IV-j feet high; lower 

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

 into narrow acute segments; aehenes spiny-tubcrculate on the raised margin as 

 well as on the sides. 



Introduced from Europe. ]\Iariposa Co. 



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

 P. B. Kennedy. 



Ref. — Ranunculus arvensis L. Sp. PI. 555 (1753), type European. 



22. R. andersonii Gray. Per(>nnial with the scapes and leaves from a stout- 

 ish rootstoek ; herbage glabrous; seajies naketl, 4 to 9 inches higli, 1-tlowered; 

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

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

 sepals and petals withering-persi.stent; 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; aehenes numerous, strongly utricular, 3 to 4 lines 

 long, the beak very short. 



Great Basin region from Oi'cgon to Arizona, entering California in ^fodoe 

 and ]Mono cos. 



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



