American Species of the Genus Anemone. 217 



1. PULSATILLA, L. Gen. PL, 163 (1737). 

 1. Pulsatilla liirsutissima (Pursli). 



Clematis hirsutissima, Parsh, Fl. Am. Sept., 385 (1814). 



Anemone Ludoviciana, Natt. Gen., ii, 20 (1818). 



A. Nuttalliana, B.C. Syst., i, 193 (1818). 



A. Nuttallii, Nutt., Journ. Acad. Phil., 1825, 158. 



Pulsatilla Nuttalliana, Spreng. Syst., ii, 663 (1825). 



A. patens, Hook., Fl. Bor. Am., i, 4 (1830), not L. 



Pulsatilla patens, A. Gray, Gen. 111., i, 18, t. 3 (1848), not Mill. 



A. patens, var. Nuttalliana, A. Gray, Man. Ed. 5, 36 (1867). 



A. patens, var. hirsutissima, Hitch., Trans. St. Louis. Ac, v, 482 (1891). 



Villous, 12-40 cm. high. Leaves much divided into narrow, linear, acute 

 lobes, the radical on slender petioles, those of the involucre similar, sessile, 

 erect or ascending ; sepals ovate-oblong, 2^-3^ cm. long, bluish-purple ; fruit 

 a head of silky achenia, with long, plumose styles. After flowering the 

 peduncle elongates, sometimes to 30-40 cm. 



Distrib. Prairies of Illinois to Manitoba, west to the Rocky- 

 Mountains, north and northwest. Perhaps also in Siberia. 



The plant differs constantly from the European P. patens (L.), in 

 its narrower and usually longer leaf-segments, and smaller flowers. 

 The type of Clematis hirsutissima, Pursh, is in the Herbarium of 

 the Philadelphia Academy of Natural Sciences. 



2. Pulsatilla occidentals (S. Wats.). 



Anemone alpina, Hook., Fl. Bor. Am., i, 5 (1830), not L. 

 Anemone occidentalis, S. Wats., Proc. Amer. Acad., xi, 121 (1876). 

 Pulsatilla occidentalis, Freyn, Deutsche Bot. Monats., viii, 78 (1890). 



Rather stout, silky-villous, 15-50 cm. high, simple. Radical leaves long- 

 petioled, biternate, the divisions deeply pinnatifid into usually incised, linear, 

 acute lobes ; leaves of the involucre similar, short-petioled ; flower 15-40 mm. 

 broad, peduncled, the peduncle much elongated in fruit ; sepals 6 or 7, oval- 

 obtuse, white or purplish at the base ; receptacle conic, sometimes 4 cm. long ; 

 achenia oblong, somewhat pubescent, the persistent plumose styles reflexed, 

 2-4 cm. long. 



The plant differs from the European P. alpina, as noted by Dr. 

 Watson, in its more finely dissected leaves with narrower segments, 

 and in its elongated receptacle. I have not seen true alpina from 

 America. 



Distrib. California: Mt. Shasta (Brewer, 1419) ; Lassen's Peak, 

 Sierra Nevada (Lemmon, 954). Oregon: Mt. Hood (T. Howell). 

 Washington: (Tweedy); Mt. Rainier (Piper). British Columbia: 



