178 OKDEK 70. COMPOSITE. 



16 H. dcc-apetalus L. Lvs. all opposite, thin, ovate, acuminate, toothed, on wiugcii 

 stalks, scabrous above, smoothish beneath. Varies with the invol. scales enlarged 

 antl leaflike, or only lance-linear. Can. to Penn. 3 4f. 



17 H. tracliellli'ollus Willd. Branch Ivs. alternate, thin, appressed-serrate, acumi- 

 nate, all ovate to lance-linear ; pales 3-toothed ; rays 1215. Thickets, W. 3 8f. 



18 H. doronicoides Lam. Branching; Ivs. ovate to lance-ovate, acuminate, ser- 

 rate ; scales lance-linear ; rays 12 15, If, very showy. W. and S. 4 7f. 



/3. plena-flora. Flowers all ligulate. Gardens. Very handsome. 



19 H. NtriimoMiiN L. Smooth below; Ivs. all similar, ovate-lanceolate, acuminate, 

 serrulate; heads few, about 10- rayed : scales ciliate, squarrons. Swamps. 3 5f. 



20 H. lilrsiitus Raf. St. simple or forked, hirsute ; Ivs. petiolate, ovate- lanceolate, 

 subscrrate, hirsute beneath ; scales lance-ovate, hairy ; rays 11 15. Dry, W. and S. Of. 



/3. pubcHcen*. Leaves tomentons beneath, subsessile. (II. pubescens Hook.) 



21 H. dIvarlCH.t.118 L. St. smooth, simple, or forked ; Ivs. rough, lance-ovate, long- 

 pointed from an abrupt sessile base ; heads few, corymbous. Woods, &c. 4 5f. 



/3. f tcabtrrtmv*. Stem subsimple : leaves thick, exceedingly rough and rigid, 

 opposite or ternately verticillate. rounded at basr W. 



22 H. mlcrocephalus T. & G. St. smooth or hispid, branched; Ivs. lanceolate, 

 acuminate, narrowed to a short petiole, rough above, whitish-downy beneath ; scales 

 lanceolate; rays 5 8, spreading 1'. Dry, W. and S. 3 5f. (H. Schweinitzii T. & G.' 



23 H. loiiglfollns Ph. Smooth throughout, branching ; Ivs. lance-oblong to laiice- 

 liiu-ar, acute, the lowest petiolate, serrulate ; heads few ; scales ovate-lanceolate 

 rays (i-10, spreading 11 2'. Damp. S. 3 of. (H. kevigatus T. & G.) 



24 H. sf^u'dlflorus. Rough-downy : simple, leafy , Ivs. 1 2'. lance-linear, sessile; 

 scales lanceolate, loose ; rays 15 20. near 2' : pappus 2 fringed scales. E. Fla. 3f. 



25 H. tenulfollus. Rough-hairy, simple ; Ivp. narrow-linear; scales lance-subulate, 

 loose ; rays 1013 (15") ; pappus 2 4 awns. W. Fla. 1 2f. Leaves 23'. July. 



57. ACTINOMERIS, Nutt. Heads many-flwcl. ; ray-fls. 4 14, rarely 

 0. Invol. scales foliaceous, subequal, in 1 3 series. Recep. conical or con- 

 vex, chaffy. Ach. compressed, flat, obovate, mostly winged and 2-awned. 

 If Plants tall, with 8-veined, serrate leaves. Heads corymbous. Rays 

 when present yellow. Autumn. 



$ ACTIMERIS. Pappus of 2 awns. Stems tall, corymbous... (a) 



$ ACILJSTA. Pappus wanting. Cypsela winged. Stems low, simple. Jn. Jl.,..No. i 



a Rays wanting. Disk corollas white. Stem narrowly winged No. 8 



a Rays 4 14. flowers all yellow. Scales in 2 or 3 series Nos. 3 5 



1 A . pauelflora N. Lvs. opp. or alternate, lanceolate to elliptical, rigid, obtuse ; hds. 



1 3. discoid, yellow ; fr. narrowly winged, the disk cupshaped. Barrens, F'la. 1 2f. 



2 A. alba T. & G. Lvs. narrow-lanceolate, acute both ways, serrulate; scales lance- 



linear, few. in one series ; fruit broadly winged. S. Car. to Fla. and La. 7f. 



3 A. liellantlioides N. Stem winged ; Ivs. alternate, ovate-lanceolate, decnrrent, 



acuminate, serrate, rough, hairy; rays 1' long, 6 14, unequal; scales erect; friit 

 narrowly winged. Copses, prairies, Ohio to Ga., and W. 2 4f. June, July. 



4 A. squarrosa N. Stem winged, tall (fi lOf); Ivs. alternate, some opposite. Ian- e- 



oblong, long (614'), pointed both ways, decurrent ; heads small ; scales spreading c I 

 dellexed; rays 4 8, regular, short. Alluvion, N. Y., W. and S. Homely. 



5 A. iiiidicaulls N. Stem wingless, branched and leafless above ; Ivs. oblong, mi 



equally serrate, closely sessile ; rays 712. broadly winged. Ga. Fla. Ala. 2 3f. 



58. COREOPSIS, L. TICK-SKED. Hays about 8, rarely 0. Involucit 

 double, each 6-12-leaved. Hecep. chatty. Cyp. obcoinpressed, cmarginate, 

 each commonly witli a 2-tootheil, upwardly-hispid pappus, sometime*. 



