32G LXXV. COMPOSITtE. Erigeron. 



purplish, channeled, simple, smooth, branching above into a large, level-topped, 

 compound corymb of showj' flowers. Leaves narrow, entire, -1 — 6' in length, 

 those of the branchlcts smaller. Rays about 12, white. Disk yellow. Aug. Sept. 

 p. amygdulin.us. St. roughish above, green ; branches of the corymb divaricate; 

 Ivs. broa'der. — duite dift'erent in aspect from variety a. Common. 

 3. D. coRNiFOLius. Less. (Aster cornifolius. MiM.) 

 St. smooth below, scabrous and slightly paniculate above, few-flowered; 

 Ivs. elliptical, acuminate, entire, tapering to the base, with scattered hairs, 

 rough-edged; 2)u-fZ. 5f«/c.'; imbricate, shorter than the disk. Grows in woods, • 

 N. and Mid. States. "Whole plant nearly smooth, erect, 1 — 2f high. Leaves 

 acuteattheba.se, paler beneath, on very short stalks. Flowers few, large; 

 outer scales ver) short. Rays about 10, white. July, Aug. 



13. ERIGERON. 



Gr. t]p, tht spring, ytpcoi', an old man ; because it is lioarj' early in th'e season. 



Heads mauy-fiowered, subhemispherical ; ray-flowers 9 very nu- 

 merous (40 — 200), narrow, linear ; flowers of the disk $; receptacle 

 flat, naked ; involucre nearly in 1 row ; pappus generally simple. — 

 Herbs with alternate leaves. Rays cyanic. 



§ Rays longer than the involucre. Mostly %. 



1. E. BELLiDiPOLiuM. Muhl. (E. pulchellum. Mr.) Rabbi's Plantain. 

 Hirsute ; radical Ivs. obovate, obtuse, subserrate; stem Ivs. remote, mostly 



entire, lance-oblong, acute, clasping; hds. 3 — 7, in a close, terminal corymb; 

 rays nearly twice longer than the involucre, linear-spatulate. — Dry fields and 

 thickets, U. S. and Can. Stem erect, simple, sometimes stolinilerous, 1 — 2f 

 high. Leaves 2 — 3' by 6 — 9", mostly broadest above the middle. Rays GO — 

 100, bluish (rarely reddish)-purple. This is our earliest species, flowering in 

 May and June. Resembles the following. 



2. E. Philadelphicum. (E. purpureum. Ait.) Narrow-rayed Robin's PL 

 Pubescent or hirsute; ivs. thin, lower spatu late, crenate-dentate, upper ob- 



long-oblanceolate, narrowed to the clasping (sometimes cordate-auriculate) 

 base, subserrate; hds. few, on long, slender peduncles; 7-ays very numerous, 

 filiform, more than twice longer than the involucre. — Woods and pastures 

 throughout N. Am. Stem slender, 1 — 3f high. Leav^es 2 — 4' by (i — 9'', lower 

 much attenuated at base, upper acute. Rays 150 — 200! reddish-purple or flesh- 

 colored, nearly as slender as hairs. Jn. — Aug. 



/?. 1 Ricardi. Caul i tie lis. coxdcite-oVcLle. Meriien, N . Ji. Ric/cai'd ! 



y. St. Stout, with coarsely serrate leaves. 



3. E. HETEROPHYLi.iiM. Muhl. (E. aunuum. Pers.) Common Fleabane. 

 While-weed. — St. hispid with scattered hairs, branching ; lis. hirsute, 



coarsely serrate, the lowest ovate, contracted at base intoa winged petiole, stem 

 leaves ovate-lanceolate, sessile, acute, the highest lanceolate; rays very numer- 

 ous and narrow. — A common weed, in fields and waste grounds. Can. to Penn. 

 and Ky. Stem thick, 2 — it' high, striate, terminating in a large, difl"use, co- 

 rymbose panicle of large heads. Rays white or purplish, 100 or more, short. 

 June. — Aug. 



4. E. STRiGosuM. Fleabane. H^ite-vxed. Daisy. 



Hairy and strigose ; Irs. lanceolate, tapering to each end, entire or with a 

 few large teeth in the middle, lower ones 3-veined and petiolate ; panicle co- 

 rymbose ; -paiijnis double. — A rough weed in grassy fields, Can. and U. S. Stem 

 about 2i high, slender, lurrowed, with close, short, stifl" hairs, and bearing a 

 large, loose corymb. Leaves also with close-pressed* bristles, sessile. PJays 

 very narrow, white. June — Oct. 



/?. (E. integerrifolium. Bw.) S/. .simple, smooth ; Zr5. entire, pubescent ; /s, 

 corymbed. Rays 100 — 150. 



§ § Rays shorler than the involucre. Plants (l) or @. 



5. E. DiVARiCATUM. Michx. 



Decumbent and diff"usely branched, hirsute; Ivs, linear and subulate; hds. 



