178 ORDER 70. COMPOSITE. 



1 6 H. deca petal us L. Lvs. all opposite, thin, ovate, acuminate, toothed, on winged 

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

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



17 H. traclieliifollus Willd. Branch Ivs. alternate, thin, appressed-serratc, acumi- 

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



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

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



ft. plena-flora. Flowers all ligulate. Gardens. Very handsome. 



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

 serrulate; heads few, about 10-rayed; scales ciliatc, squarrous. Swamps. 3 5f. 



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

 subserrate, hirsute beneath ; scales lance-ovate, hairy ; rays 1115. Dry, W. and S. Of. 



ft. pubescent. Leaves tomentous beneath, subsessile. (II. pubescens Hook.) 



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

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



ft. ? gcaberrirnus. Stem subsimplc ; leaves thick, exceedingly rough and rigid, 

 opposite or ternately verticillate, rounded at base W. 



22 H. microcephalus 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 V. Dry, W. and S. 3 5f. (H. Schweinitzii T. & G.t 



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

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

 rays 610, spreading 1 j 2'. Damp. S. 3 5f. (II. laevigatus T. & G.) 



24 H. grandlflorus. Rough-downy ; simple, leafy ; lvs.1 2', lance-linear, sessile; 

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



25 H. teimf folios. 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-flwd. ; ray-fls. 4 14, rarely 

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

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

 1C Plants tall, with 3-veined, serrate leaves. Heads corymbous. Rays 

 when present yellow. Autumn. 



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



ACHJETA. 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. 3 5 



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



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; scales lance- 



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



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



acuminate, serrate, rough, hairy; rays 1' long, 614, unequal; scales erect; fnit 

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



4 A. squarrosa N. Stem winged, tall (6 lOf) ; Ivs. alternate, some opposite, lance- 



oblong, long (6140, pointed both ways, decurrent ; heads small ; scales spreading cr 

 deflexed ; rays 48, regular, short. Alluvion, N. Y., W. and S. Homely. 



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



equally serrate, closely sessile ; rays 7 12, broadly winged. Ga. Fla. Ala. 2 3f. 



53. COREOPSIS, L. TICK-SEED. Rays about 8, rarely 0. Involucre 

 double, each G-12-leaved. Recep. chaffy. Gyp. obcompressed, cmarginate, 

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



