226 CdMloslT.i;. (I (..Mnol I K lAMILY.) 



into a slciultT petiole, lla- u|i]ict laiueolatc or liiiwir, sc-ssilc, (list ant ; lieada 

 small, con iiil)osf paiiicled ; rays wliiu^ ; <>iiht i)a|)i»us sliurl and cliaffy. — Dry 

 olil fid. Is, I'.miiiioii. .Imif. — Stem 2" liigli. 



Var. Beyrichii, CIray. liiiMiiiial, piilKTiilfiil ; stems slender, l°-2° 

 hWh; leaves mostly entire, tiie lowest elnstered, lincar-spatulale, lung-pel i- 

 oled, the upijer sessile ; iieads small; rays rose-eolor. — Sandy pine l.arnns. 

 South Carolina, and westward. May. 



2. E. annuus, Pers. Annual, hirsute, erect (2° -4° higli| ; lowest 

 leaves oMoiig, pelioled, tootiied, the ujjper lanceolate, .sessile, mostly entire; 

 heads coryml)ose ; rays wliite, not twice tiie length of the sparsely liirsiite 

 iuvtducre ; inner ])ai)i)us of the ray flowers scanty or none. — VVa.ste phiccs. 

 May -June. 



3. E. Philadelphicus, L- Hairy; .stem corymbose hranehed ahuve; 

 leaves thin, toothed or entire ; the lowest spatulate-oblong ; the upper ohlong- 

 lauceolate, clasping ; rays very numerous and narrow, jmrplish. — Low ground. 

 May. — Stem 2° -4° high. 



4. E. quercifolius, Lam. "Resembles tlie preceding, but less hairy ; 

 lower leaves mostly sinnate-])innatifi;l ; heads smaller, and rays siiorter. — 

 Low ground, South ('andina, and westward. 



-t- -I- Jinijs less niiinerous, linear. 



5. E. bellidifolius, Muhl. Hairy or villous; stem simjde ; lowest leaves 

 spatulate or obovate, toothed above the middle ; the upper ol)long, sessile and 

 entire ; heads large, solitary or corymbose ; rays broadly linear, bluish jiurple. 

 — Open woods and banks in the up])er districts. Marcli- Ajiril. — Stem 1° 

 high, stoloniferous. 



6. E. nudiculis, ]Michx. Smootli or nearly so ; stem simple, scape-like ; 

 radical leaves clustered, tliick, spatulate or obovate, entire or sliglitly toothed ; 

 the otiicrs small and remote ; heads corymbed ; rays (about .30) white. — Pine- 

 barren sw-amps. March - April. — Rliizoma thick. Stem 1°- 2° high. 



* Annitnl : rnj/s shorter than the disk. 



7. E. Canadensis, L. Hirsute or smoothish ; stem muoli branched; 

 leaves linear-lanceolate; heads very numerous, in panicled racemes, small, 

 cylindrical ; rays white ; disk flowers 4-toothed. — Old fields, common. May - 

 Sept. — Stem I°-3^ high. 



8. E. divaricatus, Miclix. Annual, decumbent, liirsute; leaves nar- 

 row-linear ; heads loosely corymbose ; rays pur])le, not longer than the simple 

 pappus ; achenium nearly smooth. — Mississippi, Tennessee, and northward. 



9. E, linifolius, Willd. Stem erect, l°-4° higli, simple or liranched ; 

 lowest leaves olilong, coarsely toothed, the upper linear, entire ; heads pani- 

 cled ; flowers 5-toothed. — Waste places. Introduced. 



18. BOLTONIA, L'Her. 



Heads many-flowered. Rays pistillate. Scales of the hemispherical invo- 

 lucre imbricated in two rows, not longer than the disk. Receptacle hemi- 

 spherical or conical, obscurely alveolate. Achenia flattened, obovate, wing- 



