Davis: RANUNCULI OF NORTH AMERICA. 491 
LR. hyperboreus var. natans REGEL, Bull. Soc. Nat. Mosc. 
evade pee. 43> |) ESOE 
Much like #. hypferboreus, but differing in having leaves 
larger, reniform or truncate at base, lobes 3 to 5, often more 
rounded: petals much larger; receptacle thickened and fleshy : 
head of fruit larger. Creeping and rooting in mud or some- 
times floating in shallow water. Rockies of Colorado. Also 
northern Asia. 
68. R. hyperboreus Rorrs. Skrift. Kjoeb. Selsk. 10: 458. 
Bre, fi 26) 1770: 
Low creeping plant with slender and glabrous stems and pet- 
ioles: one or two leaves from each (rooting) node, broadly 
ovate with rounded or truncate bases, 3-lobed or slightly cleft, 
margins of lobes nearly entire; petioles sheathing at the base: 
flowers minute, few, yellow; petals about equalling the reflexed 
sepals; peduncles 1 inch or less in length: akenes hardly com- 
pressed; beak almost wanting: head of fruit globose, hardly 2 
lines broad. Wet soil. Greenland, Labrador, Arctic Alaska; 
also Europe and Asia. 
69. R. Lapponicus Linn. Sp. Pl. 553. 1753. 
Anemone nudicaulis GrAy, in Bot. Gaz. 11: 17. 1886. 
Scapose from filiform rootstocks, 3 to 6 inches high: radical 
leaves long-petioled, 3-parted, the divisions obovate-cuneate, 
obtuse, crenate or lobed: scape slender, taller than the leaves, 
often with a lobed, bract-like leaf: flower solitary, yellow; 
petals 5 to 6; sepals of about the same length, reflexed: akenes 
a line or more long, ovate, tapering into the persistent, hooked 
beak. North shore of Lake Superior, west to the Rockies, 
north to Arctic America; also Europe and Siberia. 
70. R. delphinifolius Torr. ex Eaton, Man. 2 ed. 395. 1818. 
FR. multifidus Pursn, Fl. 2: 736. 1814. Not Forsk. 
RR. faviaitls Bice. Fl. Bost. 1 ed. 1:39. 1814. Not 
Willd. 
RR. lacustris Beck & Tracy, N. Y. Med. & Phys. Journ. 
Ze LIS. TGay- 
wr. Deck G. Don, Gen. Syst. 1: 39.. 1831. 
FR. Purshit var. aquatilis LEDEB. Fl. Ross. 1: 35. 1841. 
Le. multijidus var. terrestris GRAY, Man. 5 ed. 41. 1867. 
Aquatic or partly emersed, with long fistulous stems: sub- 
