American Species of the Genus Anemone. 225 



o o Achenia with short styles. 



12. Anemone deltoidea, Dougl. 



A. deltoidea, Dougl. in Hook. Fl. Bor.-Am., i, 6, t. 3, f. a (1830). 



Sparingly hirsute-pubescent, simple, slender, erect, 15-30 cm. high. Root- 

 stock filiform. Leaves 3-foliolate, the radical ones slender-petioled, those of the 

 involucre nearly sessile ; leaflets ovate, somewhat deltoid, obtuse or rounded 

 at the base, acute at the apex, coarsely and irregularly crenate, sometimes 

 incised, 2-5 cm. long ; flower solitary, white, long-peduncled, 15-30 cm. broad ; 

 sepals 5—6, oval-obovate, obtuse ; achenia several, densely pubescent, ovoid, 

 somewhat flattened ; style subulate, less than 1 mm. long ; receptacle densely 

 pubescent. 



Distrih. Oregon (Scouler ; Burke; Nuttall ; Howell; E.Hall, 2; 

 Nevius). Washington (Suksdorf); Columbia River (Douglas). 

 California, Humboldt Co. (Rattan ; a very large-flowered form 

 with broader involucral leaves). 



Type in Herb. Mas. Brit. 



\ X Involucral leaves slender-petioled. 

 o Eastern species. 



13. Anemone qiiinquefolia, L. 



A. quinqnefoUa, L. Sp. PI., 541 (1753). 



A. nemorosa, Amer. Authors, not L. 



A. pedata, Raf. Med. Rep. (ii) v, 361 (1808). 



A. minima, D.C. Syst., i, 206 (1818). 



A. nemorosa and var. quinquefolia, A. Gray, Man., Ed. 5, 38 (1867). 



Low, simple, nearly glabrous, 10-20 cm. high, from thick, horizontal root- 

 stocks. Radical leaves long-petioled, appearing later than the flowering stem, 

 3-foliolate, the lateral leaflets 2-parted nearly or quite to the base, the divi- 

 sions oblong, cuneate, dentate ; those of the involucre on slender petioles 

 about 20 mm. long, 3-5 parted, the divisions 3-4 cm. long, acute, variously 

 cut and lobed ; flower 18-25 mm. broad; sepals 4^9, obovate or oval, white, 

 or purplish without ; head of fruit globose ; achenia 4-10, pubescent, oblong, 

 tipped with short, bent styles. 



Distrib. Nova Scotia to Georgia, west to the Rocky Mountains; 

 also in China (Herb. Kew). 



Readily distinguishable from the European A. nemorosa by its 

 slender habit, slender petioles, less lobed divisions of the involucral 

 leaves, paler green of the foliage, and smaller flowers. 



The species is based on " Ranunculus nemorum, fragaria3 foliis, 



