COMPOSITJE, 195 ERIGERON. 



12. ERI'GERON. 

 Heads many-flowered, subhemispherical ; ray-flowers very 

 numerous (40 — 130), narrow, linear and pistillate-, flowers of 

 the disk perfect; receptacle flat, naked; involucre nearly in 

 1 row; pappus generally simple. 



Gr. ijg, the spring, yi^s^v, an old man ; because it becomes old early in the 

 season. Herbs, with alternate leaves. Rays cyanic. Pappus double in a 

 few species, the outer one very short, the inner one longer than the corolla. 

 Achenia compressed. 



1. E. BELLIDIFO'LIUM. Willd. E. pulchellum. Mx. 

 Hairy ; radical leaves ovate, subserrate ; stem leaves remote, entire, lanceo- 

 late, amplexicaul ; stem 3 — 5-flowerpd ; rays nearly twice as long as the hem- 

 ispherical calyx. An inhabitant of dry fields. Stem about 18 inches high, 

 erect, simple. Leaves mostly radical, broader and rounded at the end with a 

 few teeth, long, taperincr at the base. Stem leaves rather acute, rounded and 

 clasping at the base. Flowers few, at the top of the stem, on short stalks. 

 Rays numerous, linear, pale purple. May, Jn. Per. Robhi's Flahvtain. 



2. E. Philade'lphicum. 



Pubescent; haves subserrate, oblong-cuneate, those of the stem half-clasp- 

 ing; rays capillary, the length of the disk; stem branched above, many-flow- 

 ered. A tall, branching species, pretty common in fields and pastures. Stem 

 3 feet high, slender. Leaves clasping, the lower ones sessile and remotely 

 toothed. Flowers numerous, in a large, branching panicle. Rays very nu- 

 merous and narrow, pale purple. Jn. Per. Philadelpkia Flcahane. 



/3. (T. (^. G.); stevi stout; cauline leaves larger, mostly coarsely and sharp- 

 ly serrate, corymbs compound; rays pale purple or nearly white. Common 

 in grass lands. 



3. E. A'NNUUM. Pers. 



Stem, hispid with scattered hairs, branching ; leaves hirsute, coarsely serrate, 

 the lowest ovate, contracted at base into a winged petiole, stem leaves ovate- 

 lanceolate, sessile, acute, the highest lanceolate; ?Y7.(/s very numerous and 

 narrow. Stem thick, 2 — 4 feet high, striate, terminating in a large, diffuse, 

 corymbose panicle of large heads. Rays white or purplish, 100 or move, short. 

 June — August. Jiiinual Fleaba/ie. 



4. E. STRlG'oSUiM. 



Hairy and strigose ; lenves lanceolate, tapering to each end, entire or with 

 a few large teeth in the middle, lower ones 3-nerved and petiolate ; panicle 

 corymbose. A rough weed infesting grassy fields, much to the annoyance of 

 the cultivators. Stem about 2 feet high, slender, furrowed with scattered 

 bristles and bearing a large, loose corymb. Leaves also witii scattered bristles, 

 sessile. Rays very narrow, white. Jn. — Oct. Bienn. Fleabane While-iceed. 



(S. (E. integerifolium. Bw.); i-/em simple, smooth ; Zeace,<t entire, 3-nerved; 

 fiowrs corymbed. Plant 2 feet high, in fields and hedges. Leaves pubescent, 

 the lower ones rarely subdentate. Rays white, 100 — 150. 



5. E. Canaden'se. 



Involucre lAAong; ra?/s numerous, (40 — 50), crowded, minute ; pappvs sim- 

 ple ; stem hairy, paniculate ; leaves lanceolate, lower ones subserrate. A very 

 common annual plant of no beauty, growing by road sides and in fields. Stem 

 G — 48 inches high, branching, hairy and furrowed. Leaves very narrow, witli 



