"Ig PLANTjE WRIGHTIAN^. VI. 



and fascicled or crowded leaves, and small heads; exactly A. hebecladus, BC. 



(1396.) 



A. MULTiFLORDS, Ait, J. coMMUTATUs, Torv. Sf Gray, I. c. Rocky mountain- 

 sides, at the copper mines. New Mexico; Oct. (1156.) Also, a large form, with 

 more paniculate heads, of unusual size, passing to A. falcatus.* 



A. puNicEus, I/mw., 7. viMiNEUS, Torr. Sf Gray, Fl. 2. p. 141. Margin of springs, 

 valley of the Sierra de los Animos, New Mexico; Oct. (1157.) 



A. LONGiFOLius, Lam. ; Torr. Sj' Gray, Fl. 2. p. 139. Low bottom of the Mim- 

 bres, New Mexico ; Nov. 



A. Novi Belgi, Linn. % var. foliis membranaceis. — In thickets, on the Mimbres ; 

 Oct. (1758.) — A. Novi Belgi and A. longifolius will absorb several nominal 

 species. 



A. SIMPLEX, Willd. ; Torr. §• Gray, Fl. 2. p. 131. Banks of the Barbocomori, 

 Sonora; Sept. (1159.) — There is more than one prior name for this sjDecies. 



A. spiNosus, Benth. PI. Hartiv. p. 20. Low grounds, on the Rio Grande, near 

 San Elizario ; June. (1397.) 



A. DivARiCATUs, Ntttt. / Torr. 8r Gray, I. c. Banks of the Rio Grande, and of 

 the San Pedro, Sonora. (1160.) 



A. ANGUSTUS, Torr. %" Gray, I. c. Tripolium angustum, Lindl. Crinitaria hu- 

 milis. Hook. Fl. Bor.-Am. Aster (Tripolium) frondosus, Nutt. Conyza Altaica, 

 DC. Sand-bars of the Rio Grande, below Dona Ana, New Mexico; July. (1161.) 

 — The older stems are not strict, but diffusely spreading, the lateral ones procum- 

 bent. The root is annual or biennial. 



A. PAUCIFLORUS, Nutt. Gen. 2. p. 154 ; Torr. 8c Gray, I. c. A. caricifolius, 

 H. B. IL ! Nov. Gen. Sr Spec. 4. p. 92. t. 333. Tripolium caricifolium, Schauer in 

 Linncca, \9. p. 721. Valley west of the Chiricahui Mountains, in damp, subsaline 

 soil, and near Santa Cruz, Sonora; Sept. (1162.) — Well distinguished by its 

 rigid foliage, and the viscid pubescence or glandulosity of the flowering branchlets, 

 bracts, and pauciserial involucre. The rays when fresh are blue or purple. It is 

 the same as the Mexican plant of Humboldt and Bonpland above cited. 



A. PAUCIFLORUS, var. caule tenero, foliis angustissime linearibus. — Las Playas 

 Springs, New Mexico, in subsaline soil ; Oct. 



A. (Oxytripolium) Sonora (sp. no v.) : glaberrimus ; radice annua vel bienni ; 

 caule e basi ramoso ; ramis patentibus rigidis foliosis ; foliis infimis oblanceolatis 

 inciso-dentatis basi attenuatis, superioribus linearibus rariter spinuloso-denticulatis 

 mucronatis; capitulis solitariis majusculis; involucri hemispha^rici squamis pluri- 

 serialibus gradatim imbricatis lineari-lanceolatis acutissime acuminatis appressis 

 glabris ; ligulis exsertis ; acheniis sericeo-pubescentibus. — Loav valley, in subsaline 

 soil, west of the Chiricahui Mountains, and at San Bernardino, Sonora; Sept. 

 (1163.) — "Stems 10 to 18 inches high, branched from the base; the branches 

 rigid. Leaves about an inch long, thickish, veinless ; those of the flowering 

 branchlets small and subulate. Heads about half an inch in diameter, hemispheri- 

 cal. Scales of the involucre all short, the greenish tips subulate-pointed. Rays 



* A. Fendleri, Gray, PI. Fendl. p. 66, appears to be only a form of A. Nuttallii, Ton: Sf Gray- 



