L'wG COMPOSIT.E. (COMIMISITK FAMILY.) 



ini^ iiii>stly wiiiLifd acla'iiia. I'lijipus of two ]ii'rsistciit awns. — rcrcniiial 

 herl)S, uitli laiKu 'late serrate often (lei'unont leaves. l*'lo\ver.s yellow or wliiie. 



1. A. squarrosa, Nutt. stem jmlicsient, wiuf^ed above; leaves alter- 

 nate or ojipusite, ovate laneuolate, acmiiiiiate at eaeli end ; Iieails eoryintiose; 

 scales of tlie inv<jlnerc in 2 rows, linear-spalulate, spreading; aclieuia broadly 

 obovate, winge<l ; awns of tiie pa])pus rigid, spreading; rays 4-12, yellow. — 

 River lianks, Florida to Nortli Carolina. Sept. — Stem 4° -8° liigli. Lowest 

 leaves 1° long. 



2. A. alba, Torr. & Gray. Stem smooth, or pubescent and often sliglitly 

 winged aliove ; leaves alternate, lanceolate ; lieads loosely corymbose; scales 

 of the involucre in a single row, lanceolate-subulate; achenia mo.stly broadly 

 winged; awns of the pappus slender; flowers white ; rays none. — Hieh soil 

 in the lower districts, Georgia and South Carolina, and westward, rare. Sept. 



— Stem 4° - S° high. Leaves .')' - 8' long. 



60. COREOPSIS, L. Tickseed. 



Heads many-flowered ; the ray flowers commonly 8, neutral, rarely wanting. 

 Involucre double ; each row of about 8 scales ; the outer ones narrow and 

 spreading; the inner membranaceous and appressed. Receptacle Hat, chaffy. 

 Chaff membranaceous, mostly deciduous with the achenia. Achenia com- 

 pressed, often winged, not narrowed nor beaked at the apex, awnless, or with a 

 pappus of two upwardly hispid or serrulate awns or scales. — Herbs. Leaves 

 entire or pinuately divided. Heads solitary or corymbose. Disk dark purple 

 or yellow. Rays yellow, rarely rose-color. 



* Bai/s none. 



1. C. discoidea, Torr. &, Gray. Smooth; stem diffusely branched; 

 leaves long-petioled, 3-parted, with ovate-lanceolate coarsely serrate divisions ; 

 the uppermost often simple ; heads small, on short peduncles ; exterior invo- 

 lucre foliaceous, longer than the heads ; achenia narrowly wedge-shaped, hairy. 



— Swamps, North Carolina, and northward. July - Sept. — Stem 1° - 2^ '''o^i- 



* * Bai/s entire, or emarginate at the apex, yellow. 



•*- Leaves petioled : achenia narrowlij wechje-xhaped, 2-toothed or owned : scalex 



of the involucre eijual, the outer ones separate. 



2. C. aurea, Ait. Stem smooth, much branched ; leaves smooth or 

 slightly pubescent, entire, or 3-7-parted; the divisions oblong or lanceolate, 

 serrate, toothed or lobed', or all linear and entire ; exterior scales of the invo- 

 lucre linear-spatulate ; achenia smoothish, with two short triangular teeth. 

 (C. mitis, Michx. C. arguta, Pursh.) — Swamps. August -Oct. — Stem 

 2°-4° high. Leaves polymorphous; the uppermost commonly undivided. 

 Rays showy. 



3. C. trichosperma, Michx. Smootli ; stem somewhat 4 angled, 

 branching; leaves piunately 5-7-parted; the divisions lanceolate or linear, 

 sharply serrate or toothed ; the upper ones 3 - 5-cleft ; exterior scales of the 

 involucre linear, obtuse ; achenia hispid above, crowned with two triangular 

 hispid teeth. — Swamps, South Carolina, and northward. Sept. — Stem 1°- 

 2° high. Achenia twice as large as in the preceding. 



