Ranunculus.] RANUNCULACEiE. |5 



of the Rocky Mountains. Dr. Richardson. Drttmmond. Mrs. Percival. Mr. Todd, Newfoundland. Mr. 

 Cormack. — Allied to some states of R. affinis^ and jf?. ovalis ; or, as Schlechtendal well observes, " inter 

 R. aupcomum and R. sceleratum media, al> utroque autem toto cffilo diversa." It is distinguished from the 

 foreg-oinof species by its more delicate and membranaceous texture, by the constantly reflexod calyx, the 

 smaller and narrower petals of a pale yellow colour. Heads of pericarps globose, or but slightly elongated. 

 Carpels almost entirely glabrous, tipped with a very short style or mucro— a very imperfect one indeed, as 

 described by De Candolle. From the United States, especially from the neighboiu-hood of Boston, I possess 

 specimens whose germens have a long and a stout recurved mucro, yet in other respects precisely according 

 with our British North American R. abortivus, 



12. It. sceleratus ; foliis glabris petiolatis tripartitis, radicalibus lobls trilobatis obtuse 

 subincisis, caullnis lobis oblongo-linearibus integris, floralibus oblongis, calyce reflexo 

 glabro, carpellls minimis in capitulum oblongum dispositis. Linn. — Eiiyl But. t GSl, 

 Pursh, FL Am, v. 2. p, 392. Elliott, Carol v. 2. p. 59, Bigel Fl Bost. ed, 2. /?. 225. De 

 Cand, Prodr, v. 1. p, 34. — Hecatonia palustris. Lour. Coch, p. 371. De Cand. Syst. Veget 

 V. 1. p. 227. 



Hab. Floodedgravellybanksof rivers, from Canada to lat. 67°. Dr. Richardson. Douglas. Drummond. 

 — Almost entirely glabrous. Schlechtendal indeed mentions a pubescent variety. The species is constant in 

 the form of its radical leaves, cut and divided in a regular manner, in the very leafy stem, the small pale 

 flower, in the oblong compact head of numerous very small rounded carpels, which have scarcely any style, 

 and are furnished with a distinct marnfin aloDK" the back. 



13. a. Purshii; fluitans, caule elongate, foliis submersis capillaceo-multifidis, emersis 

 reniformibus S-S-partitis, lobis varie sectis, sepalis reflexis corolla duplo brevioribus, 

 fructu subgloboso, stylo recto ensiformi. (Tab. VII. B.) 



tf. foliis omnibus capillaceo-multifidis, flore majore, caule fistuloso, — R. multifidus. 

 Pursh, Fl Am. v. 2. p. 736. Bigel Fl. Bost ed. 2. p. 228. De Cand. Prodr. v. 1. p. 34. 

 R. fluviatilis. Bigel Fl. Bost. ed. !• p. 139, (nee aliorum.) 



/3. foliis submersis capillaceo-multifidis, natantibus reniformibus palmato-multifidis. 



(Tab. VI L B. Fig. 1.) 



y. repens, foliis inferioribus lineari-multi parti tis, superloribus reniformibus palmato-mul- 

 tifidis. (Tab. VII. B. Fig. 2.) — R. Purshii, a.. — Rich, in Frankl Istjoum. ed. 2. App. p. 23. 



J, repens, foliis omnibus reniformi-rotundatis palmato-tri-quinquefidis. (Tab, VIL 

 B. Fig. 3,)— R. Purshii, /3. Rich. I c— R, Gmelini. De Cand. Prodr. v. I. p. 35. (excl syn, 

 Schlecht.) — R. Langsdorffii. De Cand. Prodr. v. L p. 34. — Ranunculus foliis duplicato- 

 trifidis, caulibus filiformibus declinatis. Gmel Fl. Sib. v. 4, L 83. B. 



Hab, 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 gener- 

 ally creeping on mud iu very sheltered pools of water, in shady places. 0. and y. Lakes and marshes about 

 Slave Lake, Cumberland House Fort. Dr Richardson: and to the Rocky Mountains. Drummoml. I Bear 

 Lake. Dr. Richardson. Bay of Eschscholtz, on the ivestem shore of extreme Arctic America. Chamisso.— 

 This aquatic plant has a very similar habit with R. aquutilis, and, like it, varies exceedingly in the length of 

 the stems and shape of its leaves, according to its situation in deep or shallow water, in more or less flowing 

 streams, and on the almost dry mud, &c. I possess a series of specimens from the R. nmltijidus of Pursh, 

 (a name that is however pre-occupied by a plant of Forskall,) which is a more southern plant, 2 feet long, 

 thicker in its fistulose stem than a goose-quill, aud clothed with none but long capillaceous multifid leaves, 



