210 COMPOSITE. (COMPOSITE FAMILY.) 



Var. pulverulenta. Upper leaves shorter, oblong-otx>vate ; scales of the 

 (20-25-flowered) involucre linear-lanceolate; achenia smooth. (S. pulveru- 

 lenta, Nutt.) Damp pine barrens, Florida to North Carolina. Sept. and Oct. 

 Stem 2 - 4 high, often purplish. Lowest leaves 2' - 4' long. Flowers middle- 

 sized, bright yellow. 



12. S. petiolaris, Ait. Minutely pubescent ; stem mostly simple, straight, 

 very leafy ; leaves oblong-lanceolate or elliptical, acute, rough on the margins, 

 all but the lowest entire, and nearly sessile ; panicle racemose or oblong ; heads 

 large, 20 - 25-flowered ; rays about 10, showy; scales of the involucre linear, 

 pubescent; the outer ones more or less spreading ; achenia smoothish. (S. elata? 

 Ell.) Dry sandy soil, Florida to North Carolina. Sept. Stem 2 -3 high. 

 Leaves l'-2 ; long. 



13. S. speciosa, Nutt. Stem stout, mostly simple, smooth below, pubes- 

 cent above; leaves smooth, the lowest large (5' -8' long, l'-2' wide), serrate; 

 the upper ones lanceolate ; panicle compact, pyramidal ; heads rather large, 

 crowded, 15 20-flowered ; rays 6-8, showy ; scales of the involucre lanceolate, 

 obtuse ; achenia smooth. Varies, with the stem and lower surface of the 

 broader (2' -3') leaves villous ; the fewer, larger, and more scattered heads 

 about 30-flowered (S. petiolaris, EU. ?) : or every way smaller ; the short racemes 

 forming a narrow racemose panicle (S. erecta, Ell.). Dry soil, Florida to Mis- 

 sissippi, and northward ; the first variety only in the upper districts. Sept. and 

 Oct Stem 3 - 5 high, often purplish. 



14. S. verna, Curtis. Closely pubescent and somewhat hoary ; stem sim- 

 ple, or panicled above ; leaves thin, roughish, the lowest oblong, abruptly nar- 

 rowed into a long and slender petiole, the upper ones sessile and entire ; racemes 

 very slender, spreading, forming an open somewhat corymbose panicle ; heads 

 rather large, scattered, about 30-flowered ; rays narrow ; scales of the involucre 

 linear ; achenia pubescent. Pine barrens, near Wilmington, North Carolina, 

 Curtis. May and June. Stem 2 - 3 high. Lowest leaves 3' - 5' long. 



15. S. glomerata, Michx. Smooth; stem stout, simple; leaves large, 

 oblong-lanceolate, acuminate at each end, sharply serrate, the lowest tapering 

 into a petiole ; racemes cluster-like, much shorter than the leaves ; the upper 

 ones approximate and racemose; heads very large, 30- 40-flowered; rays 10- 

 12 ; scales of the involucre acute, smooth ; achenia pubescent. High moun- 

 tains of North Carolina. Sept. Stem 1 - 2 high. Leaves 4' - 9' long. 



*-+-*- Racemes corymbose. 



16. S. rigida, L. Rough-pubescent and somewhat hoary; stem, stout; 

 leaves rigid, oval or oblong, serrate, sessile ; the lowest narrowed into a petiole ; 

 corymb compact ; heads very large, 30 - 35-flowered ; rays 7 - 10 ; scales of the 

 involucre oblong, obtuse ; achenia smooth. Mountains of Georgia and north- 

 ward. Sept. Stem 3 - 4 high. Lowest leaves 6' - 9' long. 



17. S. corymbosa, Ell. Stem erect, smooth ; the branches rough-hairy : 

 lower leaves oblong-lanceolate, the upper ovate ; all fleshy, rigid, smooth, but 

 very rough and fringed along the margin ; racemes corymbose, the lower re- 

 curved ; rays long. Middle districts of Georgia. Sept. and Oct. Stem stout, 



