RANUNCITLACEAB (BUTTBHCUF FAMILY) 201 



curved beak. [R. micropetalus (Greene) Rydb. Bull. Toir. Bot. Club 29: 158. 

 1902.] — From the mountains eastward across the continent. ^ 



8. Ranunculus ovalis Raf. Proc. Dec. 36. 1814. Dwarf, 7-15 cm. high, 

 hairy: basal leaves petioled,_ oval to oblong, crenate or slightly lobed; cauline 

 mostly sessile, deeply 3-7-divided into obtuse linear lobes: flowers 10-12 mm. 

 broad; the petals narrow and much exceeding the sepals: head of carpels 

 spherical; achenes ovoid, minutely beaked. B. rhomboideus. — ^From the 

 borders of Wyoming far to the north and east. 



9. Ranunculus inamoenus Greene, Pitt. 3: 91. 1896. Green but sparsely 

 hairy, 1-3 dm. high: radical leaves short-petioled, ovate-flabellifohn, cre- 

 nately toothed or 3-lobed at summit; cauline sessile, once or twice ternUtely 

 divided into oblanoeolate segments: peduncles short, slender, solitary, or 

 several and subumbellate: cotoUa 6-10 mm. broad; the 5 petals obovate- 

 oblong: head of pubescent achenes oblong-cylindricial. — Frequent in moist 

 soil throughout our range. 



10. Ranunculus cardiophyllus Hook. Fl. Bor. Am. 1: 14. 1829. More qr 

 less pubescent, rather stout and succulent, 1-3 dm. high: some or all of the 

 radical leaves ovate-cordate and coarsely crenate; cauline 3-7-cleft or parted, 

 with broadly linear or oblanceolate divisions: flowers few to several, rather 

 large; the petals obovate-orbicular: achenes pubescent, in an oblong-cylin- 

 drical head; the style short.-^Occasional; moist valleys in the mountains. 



11. Ranunculus pedatifidus J. E. Smith, in Rees. Cycl. No. 72.' 1813-16. 

 Similar but smaller and not succulent: radical leaves nearly all more or less 

 lobed or divided, usually pedately multifid with broadly linear lobes: petals 

 pale yellow, 6-8 mm. long: achenes pubescent or glabrate, with short recurved 

 style.— Subalpine; New Mexico, northward to arctic America. 



12. Ranunculus alpeophilus A. Nels. Bull. Torr. Bot. Club 26: 350. 1899. 

 Bright green and nearly glabrous throughout, 8-15 em. high: radical leaves 

 orbicular-flab elliform to nearly reniform, crenately toothed or incisely lobed, 

 the middle lobe Ungulate; cauline few, near the top and somewhat invdluorate, 

 divided nearly to the base: flowers fiew: calyx nearly glabrous: achenes in an 

 oblong head, glabi-ous. B. niviilis EschschoUzii. {R. ocreatus Greene, Pitt. 

 4: 15. 1899.)— -Subalpine, on moist slopes; central Rocky Mountains. 



_ 13. Ranunculus pygmaeus Wahl. Fl. Lapp. 157. 18l2. Dwarf, 2-5 cm. 

 high: leaves glabrous, 3-5-cleft; the radical petioled: stems usually 1-flowered: 

 sepals glabrous: petals obtuse^ about 4 mm. long, not longer than the sepals: 

 achenes subglobose, tipped with a short hooked style, aggregated in an ob- 

 long head. — ^Alpine and rare within our range; extending to arctic America. 



14. Ranunculus Jovis A. Nels. Bull. Torr. Bot. Club 27: 261. 1900. Di- 

 minutive glabrous perennial, 2-4 dm. high: roots few, fascicled, tuberous, 

 vertical and largest below: radical leaves entire or trifid, long petioled; cauline 

 single, trifid, sessile: stem as long as the petioles, mostly 1-flowered: petals 

 oblong-spatulate, barely exceeding the broader sepals: achenes in a sub*- 

 globose head, slender beaked. B. digitatus Hook.; not B. digitatus Willd. — 

 Al|)ihe; Utah, northern Wyoming, arid westward. 



15. Ranunculus Grayi Brit. Bull. Torr. Bot. Club 18: 265. 1891. Low 

 but stouter than the foregoing two: radical leaves biternatelv or pedately 

 divided and parted; the primary divisions often petiolulate and the lobes 

 linear-oblong or spatulate: stems 1-2-flowered: petals about 5 mm. long; 

 surpassing the villous sepals: achenes subglobose, tipped with a subulate 

 beak and aggregated in a subglobose head. — Rare; on the highest peaks in 

 Colorado, and in British America. 



16. Ranunculus adoneus Gray, Proc. Acad. Phila. 56: 1863. Low, sparsely 

 villous, becoming glabrous: stems branching from the base, 1-3-leaved above, 

 sometimes sarmentose-decumbent and 2-3-flowered: leaves twice pedately 

 parted, segments narrowly linear: petals golden yellow; twice exceeding the 

 subvillous sepals: achenes crowded in an oval head, turgid, with the rather 

 long ensiform beak scarious-winged on each edge. — ^Higl^ altitudes, dlos? to 

 the snow; Colorado. 



17. ^nunculus eximius Greene, Erythea 3: 19. 1894. Radical leaves 



