composite. 355 



31. CH JEN ACT IS, DC. 



1. Ch^nactis Douglasii, Hook. & Am. 



Chamadis Douglasii, & C. achillearfolia, Hook. & Arn. Bot. Beech. Voy. p. 354 ; 



Torr. & Gray, Fl. 2, p. 371. 

 Eymenopappus Douglasii, Hook. Fl. Bor.-Am. 1, p. 316. 

 Macrocarphus Douglasii & M. achillecefolius, Nutt. in Trans. Amer. Phil. Soc. 1. c. 



Hab. Oregon ; common in prairies. The two so-called species are 

 clearly only one. 



32. HYMENOPAPPUS, LHer. 



1. Hymenopappus filifolius, Booh. 



Hab. Oregon, on the Walla- Walla River : a species of the great 

 plains eastward. 



33. B A H I A, Lag. 



1. Bahia (Eriophtllum) arachnoidea, Fisch. & Lallem. 



Bahia arachnoidea, Fisch. & Lallem. Ind. Sem. 1842; Gray, PI. Fendl. p. 100, 



adn., & in Pacif. R. R. Surv. 4, p. 105. 

 B. latifolia, Benth. Bot. Voy. Sulph. p. 30. 



Hab. San Francisco, California, where it abounds. 



2. Bahia (Epjophyllum) lanata, Nutt. 



Hab. Puget Sound, Gray's Harbor, Nisqually, &c. ; mostly the 

 slender form, B. tenuifolia, DC. 



