390 PROCEEDINGS OP THE AMERICAN ACADEMY 



261. Solidago occidentalis Nutt. ; in two forms. 



262. Chrysopsis villosa Nutt. Forms passing into C. hispida. 



263. Chrysopsis (Ammodia Nutt.) Oregana Gray, Proc. Acad. 

 7, p. 543. 



264. Grindelia hirsuttjla Hook. & Arn. Bot. Beech, p. 147. 



265. Grindelia integrifolia DC. ; Torr. & Gray, 1. c. 



266. Grindelia humilis Hook. & Arn. 1. c. ; a variety with more 

 leafy and pubescent stem. 



267. Grindelia discoidea Nutt. 268. A more slender form. 



269. Baccharis pilularis DC. Prodr. 5, p. 407. Found for the 

 first time in Oregon. 



270. Psilocarphus Oreganus Nutt. " A common weed." 271. 

 A remarkably large and luxuriant form. Probably all but P. tenettus 

 are of one species. 



272. Micropus Californicds Fisch. & Meyer ; Torr. & Gray, 

 Fl. 2, p. 265. 



273. Fransenia bipinnatifida Nutt. 274. F. Hookeriana 

 Nutt. ; Torr. &' Gray, 1. c. 



275. Wyethia robusta Nutt. ; Torr. & Gray, 1. c. 



276. Balsamorhiza deltoidea Nutt.; Torr. & Gray, 1. c. 



277. Rudbeckia occidentalis Nutt. ; Torr. & Gray, 1. c. 



278. Bidens cernua L., var. elata, Torr. & Gray ; a low form 

 of it. 



279. Gaillardia aristata Pursh ; Lindl. Bot. Reg. t. 1186.* 



280. Bahia lanata Nutt. ; a slender form. 



281. Lasthemia glaberrima DC. Prodr. 5, p. 664. Seldom 

 collected, not previously in Oregon. 



282. Helenium autumnale L., var. grandiflorum Torr. & 

 Gray, 1. c. 



283. Blepharipappus scaber Hook. Fl. Bor.-Am. 1, p. 316. 



* Ch^enactis brachypappa, n. sp. Corymboso-ramosa, tenuiter cinereo-pubes- 

 cens, glabrescens ; foliis longius petiolatis bipinnatipartitis, segmentis linearibus 

 obtusis ; pedunculis brevibus ; involucri squamis linearibus obtusis disco subdimi- 

 dio brevioribus ; corollis albis, marginalibus ampliatis ; antheris semi-exsertis ; 

 pappo simplici e paleis 4-5 quadratis subcuneatisve truncatis consimilibus 

 corolla; tubo dimidio brevioribus (nunc fl. disci uno quandoque satis elatiore). 

 In habit, size, &c, resembles C. stevioides ; but leaves more compound and their 

 segments divaricate, corolla apparently pure white and only 2^- lines long, and 

 pappus remarkably short and truncate. — Discovered by Miss Searls in the Pahra- 

 nagat Mountains, Nevada. 



