20 RANUNCULACEiE. Ranunculus, 



tulous. Hook. I. c. — R. multifidus, Purah ! Ji. 2. p. 736 ; DC. I. c. R. aqua- 

 ticus, flore fiavo, tbliis infiinis tenuissime divisis &c., C'layt. / Virg. ed. 2. 

 no. 885. R. (iuviatilis, Bisrel. Jl. Bost. ed. 1. p. 139. -R. delphinifolius, 

 Torr. in. Eat. hot. ed. 3. (1822) p. 424. R. lacustris, Btck (^ Tracy in 

 Eat. I. c. p. 423, d^ in trans. Albany inst. 1. p. 148. t. 5. 



p. submersed leaves filiformly dissected; floating ones reniform, palmately 

 many-cleft. Hook. I. c. t. 7. B.f. i. 



y. creeping; lower leaves many-cleft, with linear segments; the upper 

 ones reuiibrm, pahnately many-cleft. Hook. I. c. t. 7. B. f. 2. — R. Purshii 

 a. Richards. ! in apj). Frank I. journ. ed. 2. p. 23. 



y. creeping ; leaves all round-reniform, palmately 3-5-clcft. Hook. I. c. t. 

 7. B. f. 3. — R. Purshii /?. Hie hards, i. c. R. Gmeleni. DC.prodr. 1. p. 35. 

 (excl. syn.) R. Langsdorfii, DC. I. c. 



In ponds and muddy places, from extreme Arctic America to N. Carolina ! 

 Louisiana! Ohio! &c. West to the Rocky Mountains! and Kotzebue's 

 Sound. May-July. — Flowers bright yeUow. 



19. R. liniosus. (Nutt.l mss.) : " subaquatic, procumbent, somewhat hairy ; 

 leaves reniform, palmately 5-cleft, the segments 2-3-toothed or somewhat 

 lobed ; the divisions blunt, short and shallow ; stem 1-2-flowered ; sepals 

 shorter than the rounded petals; carpels scarcely keeled, with a short nearly 

 straight beak. 



" Margins of ponds in the eastern ranges of the Rocky Mountains, Lewis's 

 River, &.c. Near R. Purshii y. Hook. ?" Nidt. — It appears scarcely to differ, 

 except in the pubescence, from some of the numerous varieties of R.Purshii. 



20. H. Lapponicus (Linn.) : leaves glabrous ;- radical ones on long pe- 

 tioles, 3-parted, with the lobes dilated, obtuse, coarsely toothed ; scape 

 1-flowered, (sometimes 1-leaved,) longer than the leaves ; sepals 3, reflexed. 

 DC. — Linn.Ji. Lapp. t. 3.f. 4; DC.prodr. 1. p. 35; Hook. Jl. Bor.-Am. 1. 

 p. 16. 



Arctic America, from lat. 50° to the Arctic Sea. Kotzebue's Sound, 

 Hook. ^ Am. in Bat. Beechey.' — Petals 6 (8, Sclilecht.), spatulate. Car- 

 pels 6-10, in roundish heads. AUied to Ficaria. Hooker. 



21. R. hyperboreus (Rottboell) : leaves glabrous, petioled, 3-cleft ; lobes 

 oblong-oval, divaricate, the lateral ones somewhat 2-cleft, the middle one 

 undivided ; sheaths with the base biauriculate ; stem filiform, creeping. 

 DC.—Fl. Dan. t. 331 ; DC. prodr. 1. p. 35 ; Hook.Ji. Bor.-Am. 1. p. 16. R. 

 Gmeleni, Schlecht. animad. bot. 2. p. 85. (fide Hook.) 



Arctic America. — Heads globose, compact ; carpels distinctly margined on 

 the back. Hooker. — Allied to R. Cymbalaria, but distinguished by its trifid 

 leaves. DC. 



22. K.pygmceits (Wahl.) : leaves glabrous, 3-5-cleft, radical ones petioled, 

 cauline ones sessile ; stem 1-flowered ; calyx glabrous, longer than the 

 somewhat reflexed petals ; carpels roundish, pointed with a short hooked 

 style. DC— Wahl. fl. Lapp. p. 157. t. 8. /. 1 ; Pursh^ Jl. 2. p. 393 ; DC. 

 prodr. 1. p. 35; Hook..' Jl. Bor.-Am. \.p. 17. 



Coast of Arctic America ! and Rocky Mountains in lat. 55°. Spitzber- 

 gen ! Unalaschka ! Kotzebue's Sound, Hook. ^ Am. in bot. Beechey. 

 Labrador, Pitrsh, and herb. Schweinitz .' — Stem erect, never creeping, 

 1-2 inches high. Heads oblong. Carpels subglobose, not margined at the 

 back. Hooker. — Intermediate between R. hyperboreus and nivalis. DC. 



23. R. Sabinii (R. BroAvn) : radical leaves on long petioles, 3-parted ; 

 lobes elliptical, the lateral ones 2-cleft ; cauline ones sessile, 3-parted, the 

 divisions linear ; calyx hirsute, nearly equal to the retuse petals. R. Br. in 

 Parry^s 1st voy. app.p. 264; Hook.Ji. Bor.-Am. I. p. 17. 



Melville Island and Shores of the Arctic Sea. — Verj' near R. nivalis. R. Br. 

 .24. R. nivalis (R. Brown) : radical leaves on long petioles, dilated, lobed ; 



