EANUNCULACE^. 301 



leaflets and a depressed mode of growth, bearing much likeness to R. 

 repens, has been collected near Visalia, and east of Stockton. 



16. R. canus, Benth. PI. Hartw. 294 (1849): E. occidenlaiis, var. canvs, 

 Gray, Proc. Am. Acad. viii. 374: R. Californicus, var. cauus, B. & W. 

 Bot. Calif, i. fS. More or less silky-canescent, and most so when young; 

 stems erect, stoutish, l^b— 2 ft. high: leaves ternately dissected into many 

 narrow acute segments: petals 5 (rarely 7—10), round-obovate : achenes 

 large, much compressed, the beak broad at base, short and hooked; 

 head globose. Plains and hills of the interior, especially about Antioch, 

 and northward to Chico, Mm. Bidirell; abundantly floriferous and very 

 showy; apparently intergrading with R. Californicus on the one hand, 

 and R. occidentalia on the other, but sufficiently distinct. Apr., May. 



17. R. occideiitalis, Nutt. var. Eiseiii, Gray, Proc. Am. Acad. xxi. 373 

 (1886): A'. Eiseat, Kell. Proc. Calif. Acad. vii. 115 (1877). Erect, slender, 

 1 ft. high, more or less villous or hirsute with long spreading or appreesed 

 white hairs: leaves 3-lobed or -parted, the broad cuneiform segments of 

 the radical ones trifid: fl. loosely corymbose-pauicled: sepals reflexed: 

 petals 5, obovate-oblong, 3 4 lines long: achenes broad and rouudpd, 

 compressed and thin, glabrous, tipped with a short recurved beak. Var. 

 Rattaiii, Gray, 1. c. Kadical leaves more deeply parted: stem taller, 

 more freely branchmg and floriferous: achenes rather smaller, with 

 relatively longer beak, their sides hairy and papillose.— True R. occi- 

 dentab'x is probably not within our limits, unless perchance it occurs in 

 Humboldt Co. The var. Eiseni is common in the Sierra Nevada at middle 

 elevations, on dry open slopes. Var. Rattard is rather of the Coast 

 Range, from Marin Co. northward. Apr. — May. 



18. R. Xelsoiiii, Gray, Proc. Am. Acad. viii. 374 (1872): R. recwvatuK, 

 var. Nelsonii, DC. Syst. i. 290 (1818): R. tenellus, Nutt.; T. & G. Fl. i. 23 

 (1838), not Viviani (1830). Densely hirsute, at least below, with short 

 spreading or deflexed brownish hairs: stem 1 ft. high or more, the 

 branches slender, spreading: radical leaves palmately 3--5-lobed or 

 -parted, the segments cuueate, trifld: fl. very small and inconspicuous: 

 sepals reflexed: petals elliptic-oblong: achenes in a globose head, small, 

 smooth, glabrous or with short recurved hairs, the beak commonly as 

 long as the body, closely recurved at tip. Var. tenellus, Gray, Am. 

 Acad. viii. 373. Nearly glabrous: fl. very small: achenes with a much 

 shorter beak.— The type of this, common in openings among the forests 

 from Oregon to Alaska, is found in Humboldt Co., Chesnul d- Breia; the 

 variety is of the Sierra Nevada, extending southward to Fresno Co. 



19. R. hebecarpus, H. & A. Bot. Beech. 316 (1840). Slender, erect, 

 branching and leafy, 5—15 in. high, pilose-pubescent: radical leaves 

 rounded or reniform, deeply lobed or cleft, the segments 3-lobed; fl. 



