BOTANY. 



77 



t 



America and elsewhere, which it is now hardly worth while to clear up in detail, since it is 



evident that the two really belong to one polymorphous spccieSj which includes Bentham*s C. 

 virgata and C. obovata also. The plant has a persistent base, and blossoms at various seasons; 



the wool is either permanent or deciduous, etc. Should my conjecture about C. incana prove 

 true, the known forms of the genus may be reduced to two species, C. Californica and C. filagi- 

 nifolia. 



MAcn^RANTHEKA CANESCENS, Gray^ Fl. Wright. 1, p, 80, &c. Along the boundary every- 

 where, from the upper part of the Rio Grande to the Gila, &c. 



MACHiERAKTUERA TANACETiFOLiA, Nces. Ast. p. 224 ; Gray^ h c. From the Pecos to Sonora, 

 etc, ; in venous forms. 



Macii^rantiikra parviflora, Gray^ I, c. Plains and mountains, southern borders of New 

 Mexico and adjacent parts of Sonora; also on the Gila; Bigdoio^ Parry ^ Wright^ Thurher. 



PsiLACTis asteroides. Gray, PL FendL p. 72. Along the Rio Grande, from Presidio to El 

 Paso, etc., and in Sonora, 



AsiER MULTiFLORUs, Ait. Common from the lower Rio Grande to the Gila, etc. A. hebecladus 

 and A. scoparius^ D(7., are founded on exactly the same thing in Berlandier's collections. 



Aster SIMPLEX, Willd. Sonora; Wright. On the Mimbres^ New Mexico ; Bigelow. 



Aster CARNEUs, A^ees. A. coerulescens, DC. Prodr. 5,^. 235. Western Texas; Thurher^ 

 On the Pecos ; Bigeloio. 



Aster puniceus, Linn,; var. YrMi2s'EUS, Torr. <& Gray. Mimbres ; Bigelow. Sierra de los Ani- 

 mos ; Wright. 



Aster longifolius. Lam. On the Mimbres ; Wright. 



Aster NOVi-EELon, Linn. Also on the Mimbres, etc.; Wright^ Bigelow. 



Aster spinosus, Benih. PL Eartio, p. 20, Along the Rio Grande, below El Paso, to its 



Wright 



mouth. 



Aster bivaricatus, Nutf. From the lower Rio Grande to Sonora. 



Aster angustus, Torr. d Gray, L c. Sandbars of the Rio Grande, below Dc 



Bigelow. Probably brought down the river from the Rocky mountains. 



Aster pa uciflorus, Nutt.; Gray^ PL Wright^ 2, j:). 76. Subsaline soil^ west of the Chiricahui 

 mountains and Santa Cruz, Sonora ; Wright. 



Aster elepuaropiiyllus, Gray^ PL Wright^ L c. Subsaline soil, Los Playos Springs, New 

 Mexico; Wright. 



Aster Sonora, Gray^ PL Wright^ L c. In the same region as the last two species. 



Aster Chilensis, Nees.; var. ^. Torr, dt Gray, FL 2, p. 112. A. Durandi, Nutt. in herb. Cali- 

 fornia ; Rev. Mr. Fitch. 



/ 



Erigeron (Ccexotus) Canadense, Linn, On the Gila ; Thurher; and doubtless almost every- 

 where, 



Erigeron (Ccexotus) eriopeyllum, Grayy PL Wright^ 2, p. YT. On the Sonoita, Sonora; 

 Wright. 



Erigeron mackanthum, Nutt.; Gray, PI. Ftndl. p. 67, etc. Cobre, New Mexico; Wright^ 



Bigelow. 



Erigeron- divergens, Torr. & Graijj Fl. 2, p. 175; Gray, PI. Wright, 2, p. 7Y ; var. cixereum. 

 W, Texas to the Gila {Thurher) and Tucson, Sonora; Schott. 



