COMPOSITE. (COMPOSITE FAMILY.) 217 



oil naked peduncles ; scales of the involucre ovate -lanceolate, pointed, ciliate. 

 Dry open places, Ohio to Illinois, and southward Leaves almost as thick as 

 ID No. 3. Rays showy, l'-2' long. 



5. II. OCCideiltaliS, Riddell. Somewhat hairy ; stem slender, simple, 

 naked above (I-3 high, and sending out runners from the base), bearing 1-5 

 small heads on long peduncles ; lowest leaves oval or lanceolate-ovate, 3-uerved, 

 obscurely serrate, roughish-pubescent beneath, abruptly contracted into long hairy peti- 

 oles ; the upper small and remote (all opposite), entire ; scales of the involucre 

 oval-lanceolate, pointed, ciliate. Dry barrens, Ohio to Wisconsin, Kentucky, 

 and southward. 



6. H. cinereilS, var. Sililivaiitii, Torr. & Gr. Gray with a close 

 roughish pubescence ; stem branching above, hairy ; leaves ovate-oblong, sessile by a 

 narrowed base, acute, obscurely serrate ; the upper small and remote ; peduncles 

 Blender; scales of the involucre lanceolate, hoary. Darby Plains, Ohio, SuHi- 

 vant. Stem 2 -3 high, bearing few heads as large as those of the next. 



7. H. mollis, Lam. Stem clothed with soft white hairs, simple, leafy to 

 the top (2 -4 high) ; leaves ovate, with a broad heart-shaped and clasping base, 

 pointed, nearly entire, hoary above, very soft white-woolly and reticulated under- 

 neath ; scales of the involucre lanceolate, downy. Barrens and prairies, Ohio 

 to Illinois, and westward. 



# * # Heads small: scales of the involucre fete, shorter titan the yellow disk, Irregu- 

 larly imbricated, oppressed, the outer with spreading foliaceous pointed tips : rays 

 5 - 8 : leaves all but the uppermost opposite. 



8. H. microcephalus, Torr. & Gr. Stem smooth (3 -8 high), with 

 numerous slender branches above ; leaves thin, ovate-lanceolate, taper-pointed, some- 

 what serrate, veiny, petioled, rough above, downy or hairy underneath; pedun- 

 cles slender, rough ; scales of the involucre ovate and ovate-lanceolate, ciliate. 

 Thickets, W. Perm, to Illinois, and southward. Heads J' broad, the rays 

 nearly 1' long. 



9. H. Isevigatus, Torr. & Gr. Stem slender (l-4 high), simple or 

 sparingly branched, very smooth and glabrous throughout, as well as the slightly 

 serrate lanceolate leaves. Dry soil, AUeghany Mountains, west of the Warm 

 Springs of Virginia, and southward. 



* * * * Heads middle-sized or large : scales of the involucre irregularly imbricated. 



loose, with spreading foliaceous tips, as long as the yellow disk or longer. 

 *- Leaves chiefly alternate or scattered, feather-veined, sometimes obscurely triple-ribbed. 



10. H. giganteilS, L. Stem hairy or rough (3 -10 high), branched 

 above ; leaves lanceolate, pointed, serrate, very rough above, rough-hairy beneath, 

 narrowed and ciliate at the base, but nearly sessile ; scales of the involucre long, 

 linear-lanceolate, pointed, hairy, or strongly ciliate. Var. JLMnfouus has most 

 of the leaves opposite and closely sessile by an obtuse base, and approaches Xo. 

 13. Low thickets and swamps; common. Heads somewhat corymbed : the 

 pale yellow rays 15-20, 



11. H. grosse-serr situs, Martens. Stem smooth and glaucous, at least 

 below (5 10 high) ; leaves elongated-lanceolate or ovate-lanceolate, taper 



