202 COMPOSITE. (COMPOSITE FAMILY.) 



merous, crowded in compact erect-spreading sliort racemes, forming a prolonged and 

 flense narrow or pyramidal panicle ; scales of the involucre linear-awl-shaped, ap- 

 prcsscd ; rays about 10. Sandy soil, Maine to Virginia and southward, near 

 the coast. 



7. S. Strictl, Ait. Very smooth throughout; stem simple, strict (2 -3 

 high) ; leaves lanceolate, pointed, the lower tapering gradually into winged peti- 

 oles, partly sheathing at the base, minutely serrate above with appresscd teeth; 

 racemes much crowded and oppressed in a dense wand-like panicle ; scales of tbo 

 involucre linear-oblong, obtuse; rays 5-6, small. Peat-bogs, Maine to Wis- 

 consin and northward. Root-leaves 6'- 10' long. It flowers earlier than ita 

 allies, beginning in July. 



H- - Heads rather large, at least for the size of the plant, 



8. S. spcciosa, Nutt. Stem stout (3 -6 high), smooth; leaves thickish 

 smooth with rough margins, oval or ovate, slightly serrate, the uppermost oblong- 

 lanceolate, the lower contracted into a margined petiole ; heads somewhat 

 crowded in numerous erect racemes, forming an ample pyramidal or thi/rsfform jtan- 

 tele; peduncles and pedicels rough-hairy; scales of the cylindrical involucre 

 oblong, obtuse; rays about 5, large. Var. ANGUSTATA is a dwarf form, with 

 the racemes short and clustered, forming a dense interrupted or compound 

 spike. Copses, Massachusetts to Wisconsin and southward. A very hand- 

 some species ; the lower leaves 4' -6' long and 2' -4' wide in the larger forms. 



9. S. Virga-aiirea, L. Pubescent or nearly glabrous ; stem low (6'- 18' 

 high) and simple; leaves lanceolate or oblanceolate, or the lowest spainlate or elliptical- 

 obovate and petiolcd, serrate with small oppressed teeth or nearly entire ; racemes 

 thyrsoid or simple, narrow; scales of the involucre lanceolate or linear, acute ; 

 rays 8-12. An extremely variable species in the Old World and in our north- 

 em regions. (Eu.) 



Var. alpiata, Bigcl. Dwarf (l'-8' high), with few (1-12) pretty large 

 heads (3" -4" long, becoming smaller as they increase in number); leaves 

 thickish, mostly smooth ; scales of the involucre lanceolate, acute or acutish ; 

 rays about 12. Alpine region of the mountains of Maine, New Hampshire, 

 and Now York ; and shore of Lake Superior. 



Var. till mill*. Low (6' -12' high) and smooth, bearing several or nu- 

 merous loosely thyrsoid smaller heads, which, with the peduncles, &c., aro 

 mostly somewhat glutinous ; scales of the involucre obtuse; rays 6-8, short; 

 leaves varying from narrowly lanceolate and nearly entire to oblanceolate and 

 Semite. (S. humilis, Pursh, Torr. $- Gr.) Rocky banks, W. Vermont, Lakes 

 Huron and Superior, and northward. At the base of the White Mountains of 

 New Hampshire, on gravelly banks of streams, occurs a form, with the mi- 

 nutely pubescent stout stem l-2 high, the leaves larger and broader, and 

 the heads very numerous in an ample compound raceme ; the rays occasionally 

 almost white. 



10. S. tliyrsoidca, E. Meyer. Stem stout (l-4 high), n-xnd-like, pu- 

 bescent near the summit, simple ; leaves thin, ovate, irregularly and coarsely ser> 

 rate with sharp salient teeth, large (l'-4' long), all but the uppermost abruptly 

 contracted into long and margined petiole* heads large (5" -6" long), many 



