70 LAWSOIST: KEVISIOlSr OF THE 



case it will require a stretch of imagination to connect UJlora with palustris. In the 

 absence of definite information regarding DeCandolle's plant, and its relation to the East- 

 ern Siberian minima of Regel, it will be safe meantime to refer the former to C. leplosepala, 

 to which both DeCaudolle and Hooker thought it was more nearly related than to C. 

 valustris, the former pointing out that in bijlora the sepals were broader and shorter than in 

 leptosepala, — a character, however, which, in the latter plant, is exceedingly variable. 



Genus YIII.— HYDRASTIS, Lùmœus. 



Bentham and Hooker, Greuera Plantarum, I., j). *7. 



1. — Hydrastis Canadensis, Linnœus. 



Stem (9 to 18 inches high) from a fleshy rhizome, bearing a few scale-like abortive 

 leaves at base, and a large palmately divided potiolate serrated leaf near the top, the axis 

 ending in a flower, subtended by a large palmately divided and toothed leaf or bract. 

 Stem and leaf A'eins, etc., more or less hairy. 



Hydrastis Canadensis. Linn. Sp. PL, éd., 2, 3, &c., p. 784. Alton f., Hort. Kew., III., p. 

 362. Persoon, Synops., IL, p. 101. Michaux, Fl., I., p. 317. Pursh, FL, p. 389. DC Syst., 

 I., p. 218. Prod., I., p. 123. Torr. & Gr., Fl. N. A., I., p. 40. Liudl., Fl. Med., p. 3. Gray, 

 Genera, I., p. 48, t. 18. Manual, p. 47. Chapman, Fl. S. U.S., p. 11. Lawsou, Ranunc. 

 Canad., p. 51. Macoun, Cat., No. 76. 



Hydrophyllum verum Canadensium. Linn. Sp. PI., I., p. 146. 



Warnera Canadensis. Miller, Ic, IL, p. 190, t. 285. 



Canada, in water. — Limums. A mistake ; the plant grows only in rich, dry ground, 

 in shady woods. Mirviu's Woods, Prescott, Ont. — B. Billings Jr., in Herb. Bot. Soc. Ca. 

 Maiden. — Dr. P. W. Madagan. Township of Williams, Ont. — Saunders. County of Norfolk, 

 Ont.— Dr. Nichol. 



Cultivated in England in 1759 by Mr. Philip Miller. 



Genus IX.— TROLLIUS, Unnœus. 



Bentham and Hooker, Genera Plantarum, I., p. 7. 



1. — Trollius AmeRICANUS, Muhlenberg. 



Sepals 5 or 6 or more, greenish yellow, s^îreading horizontally, forming an open 

 flower. Petals small, numerous, and much shorter than the sepals and stamens. 



Trollim Americanus. "Muhlenberg, Ind. Fl. Lane, 172, (1791)." Watson. " Muhleub. 

 et Gaissenh. ined. Doun, Cat. Hort. Cantab." (1796.) DC. Bot. Cabinet, t. 56. Bot. Mag., 

 t. 1988. DC. Syst. Nat., I., p. 313 ; Prodr., I., p. 46. Loudon, Hortus Britannicus, p. 281. 

 Hook., Fl. Bor.-Am., I., p. 23. Torrey, Fl. N. Y., I., p. 40, t. 3. Ledeb., Fl. Ross., L, p. 51 

 Regel, Fl. Ost.-Sibir., I., p. 56. 



T. laxus. Salisbury, Trans. Linn. Soc, VIII., p. 303, (1803.) Pursh, Fl., IL, p. 391. 



