OF ARTS AND SCIENCES. 373 



specimens described, but not the plant of Schlechtendal which fur- 

 nished the name, and which therefore would be the type of Hooker's 

 species ; wherefore his name would not supersede Nuttall's for the 

 present species. The carpel-receptacle is naked and glabrous, and so 

 not rarely are the akenes ; but these, at least when young, are apt to 

 bear some scattered and bristly hairs, especially along the dorsal mar- 

 gin, or also on the faces. The extreme forms, — very widely different 

 in appearance, — as now regarded, are 



Var. ROBUSTUS. A span to a foot or more in height, stout-stemmed 

 and ample-leaved, large-flowered ; the obovate petals 5 or 6 lines long ; 

 and carpels even 2 lines long, numerous in the head. — R. occidentalis. 

 Gray, Proc. Am. Acad. viii. 374. R. n. sp. forma prima, fiores 

 magni, Schlecht. Animad. Ranunc. ii. 28, under R. recurvalus. — 

 Chiefly Alaskan. 



Var. Lyalli has rather large and thin leaves, short peduncles, and 

 petals not longer than the calyx, — in all these points so much like 

 R. recurvatus that it might be taken for a Western form of that spe- 

 cies ; but the carpel-receptacle is glabrous and the carpels themselves 

 sparsely hispid with the peculiar bristly hairs of the present species. 

 Lyall's specimens are from Pend Oreille River, in Idaho. But a simi- 

 lar form is found on the Oregon, near Portland, by Howell, where it 

 passes evidently into the following. 



Var. TENELLDS. Slender, sometimes tall and stems with long inter- 

 nodes, often glabrate : leaves simpler and smaller : flowers small : petals 

 commonly oblong, paler, only 2 or 3 lines long : akenes fewer in the 

 small heads, sometimes very few : styles, as in the preceding forms, 

 persistent as a stout and flattened-subulate hooked beak and equalling 

 or somewhat shorter than the akene ; this either glabrous or bristly. 



— R. tenellus, Nutt. iu Torr. & Gray. R. Nelsonii, var. tenellus. 

 Gray, Proc. Am. Acad. viii. 374. R. forma secunda, Schlecht. I.e.? 



— In wet and shady woods, and "flowering as a winter-annual" 

 (^Howell), whence probably its slenderness. 



Var. EisENi. More or less slender : petals 2 or 3 or even 4 lines 

 long: akenes glabrous, with a beak of only about half their own 

 length. — 7?. canus, Torr. Pacif. R. Rep. iv. G2, not Bentli. R. Eise- 

 nii, Kellogg, Proc. Calif. Acad. vii. 115. — Sierra Nevada, California, 

 to the Columbia River. 



Var. Rattani. Differs from the last variety only in the akenes, 

 which become roughish-papillose, and are sparsely or thickly beset with 

 short hairs ; the strongly curved beak sometimes much and sometimes 

 little shorter than the body of the akene. — N. California, on the 



