COMPOSITE, (composite familt.) 237 



§2. EXJERIGERON, Torr. & Gr. Bays elongated, crowded inmeormore rows: 

 ■pappus simple. {Erect perennials ; heads somewhat corymbed, middle-sized.) 



4. E. bellidifdlium, Muhl. (Robin's Plantain.) Hairy, producing 

 offsets from the base : stem simple, rather naked above, bearing few { I - 9 ) large 

 heads on slender peduncles, root-leaves obovate and spatulate, sparingly toothed ; 

 those of the stem distant, lanceolate-oblong, partly clasping, entire ; rays (about 

 50) rather broad, light bluish-purple. — Copses and moist banks : common. May. 



5. E. Philad61phicuill, L. (Common Fleabane.) Hairy; stem leafy, 

 corymbed, bearing several small heads ; leaves thin, with a broad midrib, ob- 

 long ; the upper smoothish, clasping by a heart-shaped base, mostly entire ; the 

 lowest spatulate, toothed ; rays innumerable and very narrow, rose-purple or flesh- 

 color. (E. purpureum, ^('(.) — Moist ground : common. June-Aug. 



§ 3. STENACTIS, Cass. Outermost bristles of the pappus short and minute, or 

 rather chaffy, forming an external series : otherwise os § 2. 



6. E. glab^Uum, Nutt. Stem (6'- 15' high) stout, hairy above, the 

 leafless summit bearing 1-7 large heads ; leaves nearly glabrous, except the 

 inargins, entire, the upper oblong-lanceolate and pointed, closely sessile or 

 partly clasping, the lower spatulate and petioled ; rays (more than 100, purple) 

 more than twice the length of the hoary-hispid involucre. — Plains N. Wiscon- 

 sin, and westward. June. 



§ 4. PHALACROLOMA, Cass. Rays numerous, but nearly in a single row, con- 

 spicuous : pappus plainly doubk, the outer a avivn of minute chaffy-bristie-form 

 scales ; the inner of scanty capillary bristles which are deciduous, or entirely 

 wanting in the ray ; annuals and biennials. 



7. E. Annuum, Pers. (Daisy Fleabane. Sweet Scabious.) Stem 

 stout (3° -5° high), branched, beset with spreading hairs; leaves coarsely and 

 sharply toothed ; the lowest ovate, tapering into a margined petiole ; the upper 

 ovate-lanceolate, acute and entire at both ends ; heads corymbed ; rays white, 

 tinged with purple, not twice the length of the bristly involucre. (E. hetero- 

 phyllum, Muhl. E. strigosum, Bigd.) — Fields and waste places : a very com- 

 mon weed. June-Aug. (Nat. in Eu.) 



8. E. Strig6sum, Muhl. (Daisy FleabaNe.) Stem panicled-corym- 

 bose at the summit, roughish like the leaves with minute oppressed hairs, or almost 

 smooth ; leaves entire or nearly so, the upper lanceolate, scattered, the lowest ob- 

 long or spatulate, tapering into, a slender petiole ; rays white,, twice the length 

 of the minutely hairy involucre. (E. integrifblium, Bigel.) — Fields, &c. : com- 

 mon. June - Aug. — Stem smaller and more simple than the last, with smaller 

 heads but longer rays. — Var. DiscofDEUM, Bobbins, has the rays minute, 

 scarcely exceeding the involucre. ^— Uxbridge, Massachusetts, and adjacent parts 

 of Connecticut and Rhode Island, Dr. Bobbins. 



§ 5. ERIGERtDIUM, Torr. & Gr. Bays about 30, in a single row, rather 

 broad: pappus simple : achenia mostly 4-nerved ; root perennial. 



9. E. v6rnum, Torr. & Gr. Glabrous ; leaves clustered at the root, 

 oval or spatulate; scape leafless, slender (l°-2° high), bearing 5-12 small 

 corymbed heads ; rays white. (E. nudicaule, Miclix. Aster vernus, L.) — Low 

 grounds, E. Virginia and southward. May. 



