SoUdago. COMPOSITiE. 1 



r- 



Texas. From Willdenow to the latest authors this has passed as the true S. serotlna, and 

 that for this. 



++ ++ Jliiiiitely pubescent or glabvate, not cinereous nor scabrous, thinnish-leaved, and the 

 lateral ribs commonly obscure: panicle mostly erect and thyrsiform, often compact, and tlie 

 heads little if at all secund: involucre of small and thin narrow bracts: rays 12 to 18, small. 

 (Related to the preceding and following, also to .S'. rtir/osa.) 



S. lepida, DC. ^. foot or two high: leaves from olilong to broadly lanceolate, acute, 3 or 4 

 inches long, very sharply and in.jstly coarsely serrate, sometimes for most of their length, 

 sometimes only al)o\e the middle, in some the teeth almost none : thyrsus very short and 

 compact, an inch or two long, little surpas-iug the upper leaves, not at all secund : lieads 



■* fully 3 lines long: bracts of the involucre subulate-linear, attenuate-acute. — Prodr. v. 339. 

 S. gifjank-a. Hook. Fl. ii. 2, in part. — Alaska, coast and islands, Haulce, Kfllu;/'/, &c., and 

 Brit. Columbia. 

 ■S. elongata, Xutt. Like the preceding, or taller, sometimes a yard high: leaves com- 

 monly narrower : thyrsus more developed and compound, 3 to 8 inches long, its branches 

 occasionally spreading: bracts of the involucre linear, acutish or obtu.se. — Trans. Arn. Phil. 



I Sc.r. I.e.; Torr. & (jray, Fl. 223, mainly. S. stricla, Less, in Linn. vi. 502. .S. r-lala. Hook. 

 Fl. ii. 5, not S.ilaiiiler. ■ — Along .streams, Brit. Columbia to California, and east to ilnntana. 

 Slave Lake, &c. .'seemingly passes on the northwest coast into .b. lepida, and eastward into 

 .?. Canadensis. 



-H- -H- -M- Pubescent (at least the stem), either hirsutely or canescently, or hispidulous-^cabrous: 

 branches of the panicle when well developed secund. 



;^ Leaves tapering gradually to an acute or acuminate point, generally thin or tliinnish: panicle 

 open, ('i naked and secund mostly recurving racemiforni clusters: bracts of the involucre nar- 

 row and thin : rays small and short. 



S. Canadensis, L. stem 2 to G feet high, from scabrous- 9r cinereous-pubemlent to hirsute : 

 leaves mostly la.nceolate, puberulent, pubescent, or nearly glabrous, sharply serrate or the 

 upper entire, veiny, and with lateral ribs prolonged parallel to the midrib : heads sniall, 

 ordinarilv only 2 lines long : bracts of the involucre small and pale, narrowly linear, acutish 

 or obtuse : rays 9 to 16, more numerous than the disk-flowers. — Spec. ii. 878 (excl. syn. 

 Pluk.); Ait. kew. iii. 210; Torr. & Gray, Fl. ii. 221. .S. altissima, L. 1. c, that is Virga- 

 aurea allksima, etc., Martyn, " Cent." (Hist. PL) 14, t. 14; not of most subsequent authors, 

 who have followed the conjectural references to DiU. Elth. S. reffexa, Ait. 1. c. 211 ; Willd. 

 Spec. iii. 20.^6. S. nutans, Desf. Cat. ed. 3, 402, .S. longifolia, S. hrader, in DC. Prodr. v. 330. 

 — Moist or drv and shad^• ground, Xew Brunswii.k to Brit. Columbia (and north to SLne 

 Lake), south to Florida and mountains of Arizona: flowering rather early. — The more 

 marked forms varying from tlie ordinary are the following. 



— Var. procera, Torr. & Gray, 1. c. Leaves less serrate or the upper entire, at least 



' the lower face and upper portion of the stem cinereous-pubescent or tomentulose with very 

 sliort and fme puliescenee: inflorescence less open or the branches ascending in less de- 

 veloped or cultivated plants: heads sometimes larger. s. procera. Ait. I.e.; Willd. L c. 



S. eminens, Bisehoff, hort. Heidelb. — Open ground, Canada and Saskatchewan to Idaho and 

 Texas, the northwestern forms commonly dwarf. 



Var. scabra, Torr. & Gray, 1. c. Like the foregoing, but the short pubescence 

 ' rough or hispidulous : leaves shorter, oblong-lanceolate to oblong-ovate, more entire, more 

 veiny (approaching rough-leaved forms of .S. rugosa) : heads sometimes 3 lines long. — 

 S. scabra, Muhl. Fl. Lancast. ined., not AViUd., which is S. rugosa. — Drier and sunnier 

 places, Penn. to Florida and Texas. (-S. scabrida, DC. Prodr. v. 331, of Mexico, appears to 

 be a form of this.) 



■"• Var. canescens Gray. Stem and both faces of the narrow and commonly entire 



leaves canescent with soft and fine pubescence : bracts of the involucre broader and more 



obtuse. Proc. Am. Acad. xvii. 197. — S. W. Texas, Berlandier, Lindheimer, Bigelow, and 



S. Xew Mexico, Tlnirher. 



Var. Arizonica, Gray, 1. c. Minutely cinereous-pubescent or puberulent, hardly 



, scabrous: stems low: heads mostly 3 lines long: thin bracts of the involucre commonly 

 acutish. — S. mollis, Eothr. in Wheeler Eep. vi. 146. — Mountains of S. Utah, Wm-J. and of 

 Xew Mexico & Arizona, B^'iieloir, Rothrock. (Heads, &c., nearly of .S'. velutina, DC, a Mexi- 

 can species, which approaches this and the preceding ambiguous forms of ,S. Canadensis.) 



