Obdbb 70.— composite. 449 



15 H. oinfereus. 0. Suliitantii Torr. & Gr. Rough, ciaerous-pnbescent ; st. 

 virgate, somewhat naked and branched above j Ivs. opposite (the upper often 

 alternate), ovate-oblong, narrowed to the sessile base, the lower to a winged petigk ; 

 scales lanceolate, canesoent, pales pointed, vrith 2 lateral teeth. — Ohio (Suliivant). 

 St. 2 to 3f high. Hds. as large as in No. 14. 



16 H. deoap^talus L. Lvs. opposite, ovate, acuminate, irregularly toothed, thin, 

 3-veined, scabrous above, smooth or nearly so beneath, on winged petioles ; scalea 

 lanceolate-linear, subciliate spreading, nearly equal; rays 9 to 12, pale yellow. — 

 Copses, along streams. Can., N. Eng. and Middle States. St. 3 to 4f high, pur- 

 plish. InvoL varying in all degrees of leaflness between the present form and 

 the variety following. Aug. f 



/3. mONDOSUS. Outer ecales larger and leaf-like. (H. frondosus L.) 



17 H. tracbaefolius "Willd. Lvs. opposite, those of the tranches mostly alternate, 

 thin, scabrous both sides, tripli-veined, appressedrserrate, acuminate, petiolate, 

 lower ones ovate, middle lanoe-ovate, upper lance-linear ; scales lance-linear, atten- 

 uate-acuminate, longer than the disk, loosely spreading, ciliate ; chaff slightly 3- 

 toothed; rays 12 to 15. — Tall, handsome, in thickets, &c., Ohio to 111. and Tenn. 

 St. purplish, 3 to 8f high. Lvs. 3 to 6' long. Hds. middle size, aj top of the slen- 

 der, subereot branches. Rays expanding 2 to 3'. 



18 H. doronicoides Lam. St. branched, roOgh or hirsute above; lvs. opposite, 

 petiolate, tfie upper aiternate and snbsessile, ovate and ovate-lanceolate, acuminate, 

 tripli-veined, serrate, very scabrous above, smooth and pubescent beneath ; scales 

 lance-linear, ciliate, longer than the disk; rays 12 to 15. — W. and S. States. St. 4 

 to 7f high, with irregular, alternate branches. Lvs. 3 to 10' by 1 to 3' ; petioles 

 •ito 1' long. Rays very showy, 15 to 20" by 4 to 6"- Jl. — Sept. 



/3. PLENA-FLOBA. Fls. all radiate. — Gardens. A handsome flower, somewhat 

 like a yellow Dahha. J 



19 H. strumdsus L. St. smooth below, scabrous above; lvs. ovate-kmceolate 

 short petioled, all similar, acuminate, finely serrate, scabrous above, smooth o» 

 tomentous-caneseent beneath; hds. few, about 10-rayed; scaXes ciliate, equaling 

 the disk, squarrous-apreading at tip. — y Grows in swamps, &o.. Can. and U. & 

 St. 3 to 5f high, erect, branching above. Lvs. petiolate, with an acute point and 

 close serratures, the lower surface varying in the degree of pubescence. Rays 

 bright yellow, an inch or more in length. Scales hairy. Jl. 



20 H. hirsiitus Raf. St. simple or diohotomous above, scabrous, hirsute ; lvs. 

 opposite, petiolate, subserrate, 3-veined, ovate-lanceolate, obtuse at base, acumi- 

 nate, very scabrous above, hirsute ieneath; scales ovate-lanceolate, acuminate, hir- 

 sute, as long as the disk ; rays 1 1 — 1 5. — Dry soils. Western and Southern States. 

 Stem 4 — If high, with irregular, alternate branches. Leaves 3 — 10' by 1 — 3', 

 petioles J — 1' long. Rays very showy, 15 — 18" by 4 — 6". Jl. — Sept. (H. diver- 

 sifolius Ell.) 



/?. PUBESCENS. Lvs. tomentous beneath, subsessile. (H. pubescens Hook.) 



21 H. divaricdtus L. St. smooth, branching or simple; lvs. nearly opposite, 

 sessile, ovato-lanceolate, 3-veined, scabrous above, smooth beneath; panicle tiicho- 

 tomous, slender, few-flowered. — Rocky woods, brook-sides, U. S. and Brit Am- 

 Stem 5f high, Raucous. Leaves rather abrupt at base, tapering to a long, aeote 

 point, with obtuse serratures. Flowers large, although small for the genus, few, 

 yellow and showy. The panicle is either 2 or 3-forked. Aug., Sept. 



3. SCABERBIMUS. St. subsimple; lvs. thick, exceedingly rough and rigid; op- 

 posite or ternately verticillate. — Barrens, West 



22 H. microcephaluB Torr. & Gr. St. glabrous; lvs. opposite, thin, oblong-lanee- 

 olate, acuminate at each end, petiolate, roughish above, doumy beneath; hds. very 

 small; scales with slender, spreading points; rays 5 to 7. — Thickets, W. Can., 

 W. States, to La. St. 3 to 6f high, fork-branched, or sometimes irregularly. Lvs. 

 4 to 5' long. Hds. 3 to 4" diam., rays spreading 1^'. Jl. — Sept. 



23 H. SohvT-einitzii Torr. 4; Gr. St. pubescent, with oppressed, bristly hairs; bxi. 

 rough above, densely tomentous-caneseent beneath, otherwise as in No. 22. — ^N. Car. 

 in the upland counties (Curtis). Similar to H. miorocephalus, except in its rough 

 and downy clothing. 



24 H. laevigatus Torr. i Gr. Smooth throughout; at. slender, nearly simple; 



29 



