218 COMPOSITE, (composite family.) 



pointed, sen-ate, rough above, rounded or acute at the base, petioled, rough 

 above, hoary and downy beneath; scales of the involucre lance-awl-shaped, slight- 

 ly ciliate. — Dry plains, Ohio to Illinois, and sonthwestvvai'd. — Probably runs 

 into the last. 



12. H. tomentosus, Michx. Stem hairy, stout (4° -8° high); leaves 

 oblong-lanceolate, or the lowest ovate, taper-pointed, obscurely serrate, large (,5'-12' 

 long), somewhat petioled, very rough above, soft-downy beneath ; scales of the in- 

 volucre with very long and spreading tips, hairy, the chaff and tips of the disk- 

 flowers pubescent. (Disk 1' broad; rays 12-16, 1' long.) — Rith woods, Illi- 

 nois ■? Virginia and southward along the mountains. 



t- -I- Leaves opposite, or the uppermost alternate, 3-nerved or triple-ribbed. 



13. H. Struniosns, L. Stem rather simple (3° -4° high), smooth be- 

 low ; leaves ovate-lanceolate, tapering gradually to a point, serrate unth small oppressed 

 teeth, abruptly contracted into short margined petioles, rougli above, irhilish and 

 naked or minutdy downy underneath ; scales of the involucre broadly lanceolate 

 with spreading tips, equalling the disk; rays mostly 10. — Var. mollis has the 

 leaves softly downy underneath. — River-banks and low copses ; coramoii, espe- 

 cially westward. 



14. H. divaricatUS, L. Stem simple or forked and corymbcd .it the 

 top (l°-4° high) smooth; haves all opposite and divaricate, ovate-ltuiccolate, 3- 

 nervedjrom the rounded or truncate sessile base, tapering gradually to a sharp point 

 (3' -6' long), serrate, ihichish, rough both sides ; scales of the involucre lanceolate 

 from a broad base, pointed, equalling the disk ; rays 8-12. — Tliickets and bar- 

 rens; common. — Disk J' wide; rays 1' long. 



15. H. Mrsutus, Raf. Sfem simple orforkcd above, stout (l°-2° high), 

 bristly-hairy ; leaves more or less petioled, ovate-lanceolate, gradually pointed, slightly 

 seirate, rounded or obtuse at the base, vejy rough above, rough-hairy underneath ; 

 scales of the involucre ovate-laueeolate, pointed, equalling the disk ; rai-s about 

 12. — Dry plains, &c., Ohio to Illinois, and southward. — Too near the l.ast. 



16. H. traclieliifolius, Willd. Stem loosely branched, tall, hairy; 

 leaves thin, ovate-lanceolate, or oblong-lanceolate, taper-pointed, sharjity serrate, 

 smoothish or roughish-pubescent both sides, contracted into slwrt petioles ; scales of 

 the involucre lanceolate-linear, elongated and very taper-pointed, loose, exceed- 

 ing the disk ; rays 12-15. — Copses, Penn, ■? Ohio to Illinois, and soutliward. — 

 Probably runs into the next. 



17. H. decapetalus, L. Stem branching (3° -6° higli), smooth be- 

 low; leaves thin and green both sides, smooth or roughish, ovate, coarsely seirate, 

 pointed, abi-uptly contracted into margined petioles ; scales of the involucre 

 lanceolate-linear, elongated, loosely spreading, the outer longer than the disk ; 

 rays about 10. — Var. FKONDisns has the outer involucr.al scales foliaceous or 

 changing to leaves. — Copses and low banks of streams ; common, especially 

 northward. (H. multiflonis, L., is probably a cultivated state of this.) 



18. H. doi'onicoides, Lam. Stem stout (5° -9° high), branching, 

 rough-hairy above ; leaves ovate or oblong-lanceolate, pointed, sen-ate, strongly triple- 

 veined, rough above, smoothish or downy underneath, the lower often heart-shaped 



