Solidago. COMPOSITE. 159 



lines long : bracts of the involucre rather rigid, glabrous, oval to linear-oblong : rays 3 to 6, 

 rather fewer than disk-flowers: akeues minutely pubescent. Jour. Acud. Philad. vii. 327; 

 Torr. & Gray, Fl. ii. 220. S. rutundifolia, DC. Prodr. v. 332, & 5. scubcrrima, Torr. & Gray, 

 1. c., broad-leaved form. S. decemflora, Gray, PI. Lindli. ii. 223, not DC. Dry hills and 

 prairies, S. W. Illinois to Arkansas, W. Louisiana, and Texas ; first coll. by Bcrlandier and 

 Nuttall. 



c. Scabro-puberulent, somewhat cinereous, small-leaved: the lateral ribs obsolete. 



S. sparsiflora, GRAY. Founded on incomplete specimens (branches), of doubtful affinity, 

 scabrous rather than puberulent, leafy into the narrow and strict branches of the panicle : 

 leaves all small (the larger hardly an inch long), lanceolate-linear, rather acute at both ends, 

 rigid, entire, with lateral ribs and veins almost obsolete : heads somewhat scattered or few 

 in the short imperfectly racemiform and somewhat secund clusters, 3 lines long : bracts of 

 the involucre rather small, oblong-linear, barely obtuse : rays 6 to 10, little surpassing the 

 disk. Proc. Am. Acad. xii. 58; Rothr. in Wheeler Rep. vi. 146. S. Arizona, near Camp 

 Lowell, Rothroclc. Llano Estacado, N. W. Texas on the borders of New Mexico, Bigelow. 

 To which must be added 



Var. Sllbcinerea, GRAY. Quite cinereously puberulent, the leaves scabro-puberulent : 

 heads more crowded and secund in the virgate panicles : rays more conspicuous. Proc. 

 Am. Acad. xvii. 197. Rucker Valley, S. Arizona, Lemmon. Base of stem and lower leaves 

 unknown : the affinity decidedly with .S'. nemoralis. Also a form between this and /?. Cana- 

 densis, var. canescens, with larger heads, &c., coll. New Mexico in the Mogollon Mountains, 

 1881, litisby. 



= = = Leaves thinnish, puberulent but green, broad, acute, divergently triplinerved and 

 veiny: brandies of the loose panicle racemiform, secund, leafy: bracts of the involucre nar- 

 rowlv oblong, obtuse, outer with greenish tips : rays few. 



S. Druinmoildii, TORR. & GHAY. Soft-puberulent : stem 3 feet high, freely branched : 

 leaves ovate or broadly oval, nearly or quite glabrous above; cauliue copiously serrate, com- 

 monly acute at both ends, almost pctioled (lower 3 or 4 inches long and 2 or more broad) ; 

 those of the flowering branches numerous even through the inflorescence, from 2 inches 

 down to a quarter-inch long, obtuse, sparingly denticulate or entire : rays 4 or 5, often 

 3-lobed, rather large. Fl. ii. 217. S. ulmifolia, Hook. Comp. Bot. Mag. i. 97. S. W. Illi- 

 nois and Missouri to Louisiana, flowering late ; first coll. by Drummond. Allied in some 

 respects to S. rugosu and S. amplexicaulis. 



% # ^ * * Heads in a compact and corymbiform thyrsus or cyme: radical leaves mostly 

 long-petioled and with prominent midrib: akenes except in the firtt species wholly glabrous. - 



CoKYMBOS.E. 



-i Leaves, even the radical, not triplinerved, flat; cauline sessile, very numerous: involucre uf 

 oblong-linear to oval faintly striate bracts: akenes very glabrous. 



S. rigida, L. Somewhat cinereous with a short and dense, either soft or (in age) rather 

 scabrous pubescence : stem stout, 2 to 5 feet high (rarely more dwarf) leaves rigid, obscurely 

 serrate or entire ; radical and lowest cauline oval or oblong, rounded at both ends or acute 

 at base, 3 to 7 inches long ; upper cauliue ovate-oblong, gradually smaller upward, with 

 slightly clasping or decurrent base : clusters dense : heads about 5 lines long, campannlate, 

 many-' (over 30-) flowered: iuvolucral bracts broad: rays 7 to 10, rather large: akenes 

 turgid, 12-15-nerved. Spec. ii. 880; Ait. Kew. iii. 216 ; Michx. Fl. ii. 118; Ell. Sk. ii. 390; 

 Torr. & Gray, Fl. ii. 208. S. grandiflora, llaf. in Med. Rep. hex. 2, v. 359, & Desv. Jour. 

 Bot. i. 226. Dry and gravelly or sandy soil, Canada to the Saskatchewan, south to the upper 

 part of Georgia, southwest to Texas and W. Colorado. Varies with smaller heads, looser 

 inflorescence, and greener more scabrous leaves, in Texas, &c. 



S. COrymbosa, ELL. Stem and leaves (except their margins) quite smooth and glabrous, 

 green: heads (3 to 5 lines long) in looser inflorescence: akenes short, turgid, 10-nerved: 

 otherwise as in the preceding, of which it may be a glabrous variety. Sk. ii. 378 ; Torr. & 

 Gray, 1. c. ; not of Poir. Suppl. v. 461, which is a form of S. Viiynurea. Upper and middle 

 Georgia and Alabama; first coll. by Mr, Jackson: apparently also in Texas. 



S. Ohioensis, RIDDELL. Glabrous and smooth throughout : stem slender, 2 or 3 feet high : 

 radical and lower cauline leaves lanceolate or elongated-oblong, 5 to 9 inches long, half-inch 

 to an inch or more wide, attenuate at base, almost entire ; upper lanceolate, sessile by a 



