2 PROCEEDINGS OF THE AMERICAN ACADEMY 



Desert, S. E. California, Palmer (1876, confounded with A. larlci- 

 fulius), S. B. Sf W. F. Parish (1881), Pringh, 1882. 



Greenella PiscoiDEA. Ramis strictis fastigiatis ; capitulis 

 minoribus; ligulis nullis ; ovariis glabris dcmum secus costas minutis- 

 sime puberulis ; pappi corona pluricreuulato nudo. — S. Arizona, in 

 Tanner's Canon, Sept., Lemmon. — G. Arizoiiica, which has been freely 

 distributed by Lemmon and Pringle, by the latter in fruit, has the 

 mature akene very villous, in the manner of Gutierrezia eriocarpa, &c. 

 If, disregarding the color of the ray-flowers, this genus were referred 

 to Gutierrezia, both would have to be combined with Xanthocephalum, 

 which would hardly do. 



EiiiGERON AuizoNicus. XJltrapcdalis e radice ut videtur annua, 

 ramosus, pube patente cinerea uudique hirsutus ; fbliis fere integerrimis 

 (1-2-pollicaribus), radicalibus oblongo-obovatis in petiolum angustatis, 

 caulinis plerisque lanceolatis acutis arete sessilibus; ramis monoceph- 

 alis ; involucro (lin. 3-4 alto) cinereo-hirsuto ; ligulis (lin. 4 longis) 

 perplurimis angusto-linearibus albis ; acheniis obovato-oblongis hir- 

 sutulis binervatis ; pappo duplici, exteriori setoso-squamellato con- 

 spicuo. — S. Arizona, near Tanner's Canon, Iluachuca, Lemmon. 



Erigeuon Neo-Mexicanus. E. deJphinifolio similis ; dilfert (ut 

 dixit Benth.) pube hispida patente, lobis foliorum superne latioribus, 

 ligulis minus numerosis parum latioribus. — E. delphinifolius, Gray, 

 PI. Wright, ii. 77, & Bot. Mex. Bound. 78, non AVilld. & IIBK. 

 — New Mexico and Arizona, Wright, Bigelow, Thiirber, Palmer, 

 Lemmon. Bentham (in Gen. PI. ii. 281) indicated this as distinct 

 from the Mexican species ; and the differences, though not great^ seem 

 to be constant. 



Erigeron Lemmoni. Inter Boreal i-Americanas anomalus, e ra- 

 dice perenni diffuso-decumbens, raraosissimus, pube hirsutula cinereus ; 

 ramis gracilibus foliosissirais; foliis (parum semi poll icaribus) spathu- 

 latis, caulinis sa^pius 3-5-lobatis sen laciniato-dentatis, ramealibus 

 integerrimis ; capitulis brevi-pedunculatis parvis (lin. 2 altis) ; involucro 

 hirsutulo, bracteis subulatis suba'qualibus ; ligulis 40-50 purpureis 

 discum longius superantibus ; pappo e setis pauciusculis cum setulis 

 minimis. — S. Arizona, in Tanner's Canon of the Iluachuca Moun- 

 tains, with " stems sometimes 2 feet long," in the specimens a span or 

 two long, Lemmon. 



Erigeron Oregands. Ut videtur biennis, pube molli tenui pubes- 

 cens ; caulibus e rosula foliorum radicaliura plurimis ultraspithamaiis 

 debilibus foliosis apice l-4-ce[thalis ; foliis spathulatis imisve obovato- 

 cuueatis, radicalibus 3-5-lol)atis vel inciso-dentatis; capitulis brevi- 



