178 ORDER 70. COMPOSITE. 



16 H. decapetalns L. Lv?. all opposite, thin, ovate, acuminate, toothed, on winged 

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

 and leaflike, or only lance-linear. Can. to Penn. 8 4f. 



1 7 II. traclieliifolius Willd. Branch Ivs. alternate, thin, appressed-serrate, acumi- 

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



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

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



/3. plrna-Uin-a. Flowers all ligulate. Gardens. Very handsome. 



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

 serrulate; heads few, about 19- rayed; scales ciliate, squarrous. Swamps. 3 5f. 



20 H. liirsutus Raf. St. simple or forked, hirsute; Ivs. pctiolate, ovate-lanceolate, 

 subset-rate, hirsute beneath ; scales lance-ovate, hairy ; rays 1115. Dry, W. and S. 6f. 



. pubcucens. Loaves tomeiitous beneath, subsessile. (H. pubcscens Hook.) 



21 H. divarlcatus 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. ? scabirrtmvst Stem subsimple : leaves thick, exceedingly rough and rigid, 

 opposite or ternately verticillate, rounded at base VV. 



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

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

 lanceolate ; rays 5 S, spreading V. Dry, W. and S. 3 5f. (H. Schweinitzii T. &G.) 



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

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

 rays (5-10, spreading 1^2'. Damp. S. 3 5f. (H. laevigatiis T. & G.) 



24 H. gran diflor us. 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. tenuifolltis. Rough-hairy, simple ; Ivs. narrow-linear ; scales lance-subulate, 

 loose ; rays 1013 (15") ; pappus 24 awns. W. Fla. 1 2f. Leaves 23'. July. 



57. ACTINOMERIS, Nutt Heads many-flwcl. ; ray-fls. 414, rarely 

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

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

 if Plants tall, with 3-veiued, serrate leaves. Heads corymbous. Rays 

 when present yellow. Autumn. 



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



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



a Rays wanting. Disk corollas white. Stem narrowly winged No. 2 



a Rays 414, flowers all yellow. Scales in 2 or 3 scries Nos. 35 



1 A. pauciflora N. Lvs. opp. or alternate, lanceolate to elliptical, rigid, obtuse ; lids. 



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



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



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



3 A. lieliantlioides N. Stem winged; Ivs. alternate, ovate-lanceolate, dccurrcnt, 



acuminate, serrate, rough, hairy ; rays 1' long, G 14, unequal ; scales erect ; fr^it 

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



4 A. squarrosa N. Stem winged, tall (f> lOf) ; Ivs. alternate, some opposite, lance- 



oblong, long (6 14'), pointed both ways, decurrent ; heads small ; scales spreading f .r 

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



5 A. iiiidicaiilis N. Stem wingless, branched and leafless above ; Ivs. oblong, un- 



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



58. COREOPSIS, L. TICK-SEED. Hays about 8, rarely 0. Involucre 

 double, each G-12-leavcd. Recep. chaffy. Cyp. obcompresscd, cmnrginate, 

 each commonly with a 2-toolhcd, upwardly-hispid pappus, sometimes 



