72 



EKYTHEA. 



2. S. CESPITOSUS, Nutt. 1. c. (1840). Chrysopsis cespi- ' 

 iosa, Nutt. 1. c. (1834). Aplopappus acaulis, var. glahraius, 



D. C. Eaton, in Bot. King Exp. 161 (1871). Aster cespi- 

 iosus, O. Ktze. Kev. Gen. 315 (1891).— Wyoming to eastern 

 Nevada. 



3. S. AEMEEioiDES, Nutt. 1. c. (1840). Aplopappus 

 urmerioides , Gray, Syn. El. 132 (1884). Asier armerioides, 



0. Ktze. 1. c. 317 (1891).— Wyoming to New Mexico. 



4. S. stenophyllttS. Aplopappus stenophyllus, Gray, 

 Bot. Wilkes Exp. 347 (1874). Asier stenophyllus, O. Ktze. 



1. c. 318 (1891). — Idaho and Washington to northeastern 

 California. 



5. S. laniiginosus. Aplopappus lanuginosus, Gray, 1. 

 c. (1874). Aster Pickeringii, O. Ktze. 1. c. 316 (1891). 

 Washington to Montana. 



In publishing these last two species Dr. Gray remarked 

 upon their lack of conformity to the typical Stenotus and 

 suggests a connection with "Arnicella" i. e. the Homopap- 

 pus section of Pyrrocoma. But their habit and the soft 

 copious white pappus exclude them from that group. They 

 are really much nearer the alpine acaulescent species of 

 Aster J and since we have undoubted Erigerons with yellow 

 flowers, so these might easily be received as correspondingly 

 yellow-flowered Asters, had they but the less copious firmer 

 and dingy pappus-bristles of Aster j but in view of these 

 facts we cannot but refer them to Stenotus rather than to any 

 other genus. , 



6. S. LiNEARiFOLius, Torr. & Gray, Fl. ii, 238 (1842). 

 Aplopiappus linear if olius, DC. Prodr. v, 347 (1836).— Dry 

 slopes of the inner Coast Eange of western middle California. 



7. S. interior. Aplopappus interior, Coville, Proc. 

 Biol. Soc. vii, 65 (1892).— Desert hills of eastern California 

 and adjacent Arizona. A very good species, happily segre- 

 gated from the precediner bv Mr. Covillo. 



