46 LAWSON : EEVISION OF THE 



Batrachium Drouelii. Nyman, Nya. Bot. Not. Au. 1852, p. 98. 



British Columbia ( Wood) ; Lower Fraser River, Columbia (Dr. Lyall) ; Cascade Mouu- 

 taius, U.S. [Dr. Lyall) ; Aleutian Isles. — Hiern, 1. c. "Widely spread through Europe ; also 

 Asia, Africa, South America. 



[Var. SUBMERSUS, with more numerous stamens, larger, with bigger flowers and 

 more elongated submersed leaves, occurs at Boston, U.S., and is in all probability widely 

 distributed. — Hiern.] 



6. — Ranunculus multifidus, Pursh. 



Plant wholly or partially submersed, or creeping on wet mud. Stem rooting at the 

 joints. Leaves orbicular in oiitline, all, or the lower submerged ones, dissected into 

 numerous very narrow capillary, or broader linear segments or veins, the ujiper or emersed 

 leaves flat, rounded or somewhat reniform, lobed or cleft into more or less angular lobes, 

 but not dissected. Petals large, bright yellow. 



Raminculus midtijidus. Pursh, Fl. Am., IL, 736 (1815). DC. Syst. Nat., I., p. 270. Prod., 

 I., p. 34. Grray, Manual, ed. 5, p. 40. Lawson, Ranunc. Canad., p. 41. "Watson, Bibl. 

 Index, I., p. 20. Macoun, Cat. No. 29. Not R. muUifidm, Forskœhl, which is an Arabian 

 plant. (7J. ForskœhUi, DC). 



R.fluvkitilis. Bigelow, Fl. Bost., ed. 1, p. 139. Not of "Willdenow (although so quoted 

 by DC). 



R. laçustrh. Beck & Tracy, in Eaton's Manual, ed, 3, p. 423, (1823.) 



R. Purshii. Richardson, in App. Frankl. Jour., ed. 2, p. 23, (1823). Hook., Fl. Bor.- 

 Am., p. 15, t. 7. Torr. & Gr. Fl., I., p. 19. Hook, f., Arct. PL, p. 283. Chapman, Fl. 

 S. U.S., p. 8. "Wood, CI. Bk. & Fl., p. 206. Rothr., Fl. Alask., p. 442. 



Ft. delphinifolius. Torrey, Eat. Man., ed. 4, p. 424. 



R. amphibivs. James, Cat., 183. 



R. Beckii. Don, Mill. Diet., I., p. 39. 



R.fluUans. Provancher, Fl. Canadienne, p. 10, not of Lamarck. 



R. radicans, var. multifidus. Regel, Fl. Ost.-Sib., I., p. 45. 



Common throughout the eastern and prairie districts, from Canada to near the Arctic 

 Sea ; never observed floating in deep water, but sometimes spreading over the surfaces of 

 sphagnous bogs, more generally creeping on mud in very sheltered pools of water in 

 shady places ; lakes and marshes about Slave Lake, Cumberland House Fort. — Richardson. 

 And to the Rocky Mountains. — Druvimond. Extending to near the Arctic Sea. — Hooker. 



In ditches and muddy pools, not rare in Ontario. Sloate Lake, Sydenham, 7th 

 June, 1859, ; near Yarker, 11th July, 1861 ; marsh between Forfar and Newboro', on the 

 Rideau, 4th July, 1862. — Lawson. Creek in Gladford, 25th May, 1860. — Logic. Conway 

 Creek, Prescott. — B. Billings jr. Maiden, abundant. — Dr. P. W. Madagan. Very abun- 

 dant in ponds around Belleville, Ont. ; Cape Breton. — Macoun. "Windsor, Nova Scotia. 

 — How. Kotzebue Sound. — Rothrock. 



