190 PROCEEDINGS OF THE AMERICAN ACADEMY 



■f- -h- Akenes canescently hirsute : stem and branches angled, 

 not glaucous. 



S. LATiFOLiA, L. excl. syn, Pluk. S. Jlexicaulis, L., ex. syn. & char., 



not of herb. 

 S. LANCiFOLiA, Torr. & Gray, in Chapm. Fl. 209. 

 S. CuRTisii, Torr. & Gray ; with var, pubens, the S. puhens, Curtis, 



in Torr. & Gray. 



-1- •)— H— Akenes glabrous : inflorescence virgately thyrsoid. 



S. MONTICOLA, Torr. & Gray, in Chapm. Fl. S. Curtisii, var. ? mon- 



ticola, Torr. &. Gray, Fl. 

 S. BICOLOR, L. aS'. viminea, Bosc in herb. Poir. ; therefore S. erecta, 



DC. Prodr. — Var. concolor, Torr. & Gray. S. hispida, Muhl. 



in Willd. S. hirsuta, Nutt. — Var. lanata. S. lanata, Hook. Fl. 



* * * TlITRSIFLOR^. 



H— Southwestern species, fully two feet high, with very numer- 

 ous short and firm entire leaves, uniform up to the inflorescence : 

 pubescence minute, somewhat scabrous and cinereous : heads 

 four lines long. 



S. BiGELOVii, Gray, Proc. Am. Acad. svi. 80. Cinereous-puberu- 

 lent ; leaves oval and oblong, mostly obtuse at both ends, and his- 

 pidulous on the margins ; thyrsus simple or compound, rather dense, 

 or at length open ; involucre broadly campanulate, puberulent ; 

 akenes minutely pubescent or glabrate. S. petiolarls^ Gray in Bot. 

 Mex. Bound. 79, not Ait. Mountains of New Mexico and Arizona ; 

 also adjacent Mexico. — It passes into var. Wrightii. A form 

 with sometimes narrower leaves, and a simple thyrsus of few heads, 

 inclining to corymbose. S. petiolaris, var.. Gray, PL Wright, i. 94. 

 S. Wrightii, Gray, 1. c. Southwestern Texas to Arizona. 



S. LiNDHEiMERiANA, Scheele in Linna3a, xxi. 599. S. speciosa, var. 

 rigidiuscula, Gray, PI. Lindh. ii. 222, not Torr. & Gray. 



•I- -I- S. Alleghanian species, with thinner and bright green mostly 

 ample and serrate leaves. 



•H- Of the middle country. 



S. BucKLEYi, Torr. & Gray. A somewhat stately species, obtained 

 from Middle Alabama by Buckley, perhaps even earlier from Lin- 

 coln Co., North Carolina, by M. A. Curtis, and later in Jasper Co., 

 Georgia, by Professor Porter. 



