392 PROCEEDINGS OF THE AMERICAN ACADEMY 



301. Antennaria margaritacea P. Br. ; an unusually small 

 form of this species. 



302. Antennaria dioica Gaertn. ; and 303. A. alpina Gaartn. : 

 female plants of both. 



304. Senecio subnudus DC. ; Ton*. & Gray, Fl. 2, p. 444. 



305. Senecio fastigiatus Nutt. ; Torr. & Gray, 1. c. A pretty 

 rare species. 



306. Senecio exaltatus Nutt. Probably a mere variety of S. 

 lugens, to which it has been referred. 



307. Senecio triangularis Hook. Fl. Bor.-Am. 1. 115 ; a variety 

 with smaller leaves and heads than the original, and with many of the 

 upper leaves tapering to the base : wherefore it was thought to be the 

 little-known S. serra Hook, 1. c; but that, according to Professor Oliver, 

 has still smaller heads, and leaves gradually narrowed to the base. 



308. Arnica latifolia Bongard. A. Menziesii Hook. Fl. Bor.- 

 Am. 1, t. 111. In various, mostly small, forms. 



309. Arnica amplexicaulis Nutt. ; Torr. & Gray, 1. c. Some 

 of the specimens tall and remarkably leafy. 



310. Cirsium edule Nutt. 311. C. remotifolium DC.; Torr. 

 & Gray, 1. c. ; not well named. 



312. Cirsium undulatum Nutt. : Torr. & Gray, 1. c. 



313. Calais laciniata Gray, in Bot. Whippl. p. 57. Scorzonella 

 Nutt. ; Torr. & Gray, Fl. 2, p. 470. 



314. Apargidium boreale Torr. & Gray, Fl. 2, p. 474. 



315. Macrorhtnchus heterophyllus Nutt. ; Torr. & Gray, 

 1. c. Small and pubescent form, with outer achenia inclined to have 

 undulated wings, as in Nuttall's description. 316. A small, less pubes- 

 cent form. 317. Larger form ; achenia merely ribbed. 



318. Macrorhtnchus Lessingii Hook. & Arn. A" small form: 

 root obviously not annual. 



319. Macrorhtncus laciniatus Torr. & Gray, 1. c. ; a slender 

 form, with finely cut leaves. 320. A larger form, answering to var. 

 longifolius Toit. & Gray, 1. c. 



321. Macrorhtncus elatus Torr. & Gray, 1. c. : form with 

 broad merely pinnatifid-incised leaves. 



322. Stephanomeria paniculata Nutt. ; Torr. & Gray, 1. c. 



323. Hieracium Scouleri Hook. Fl. Bor.-Am. 1, p. 298. 



324. Hieracium triste Willd. H. gracile Hook. Fl. Bor.-Am. 

 1. c- 



