206 COMPOSITAE. (COMPOSITE FAMILY.) 
Florida to South Carolina. Sept. — Stem 19 - 39 high. Lowest leaves oval c 
lanceolate, toothed ; those of the branches short and bract-like. Rays blue. . 
48. A. exilis, Ell. Very glabrous; stem slender, tall, sparingly branched; 
leaves very long, linear-subulate; heads in racemes ; scales of the involucre 
linear-lanceolate, half as long as the rays. — Damp soil, in the Western districts 
of Georgia. Sept. and Oct.— Stem 4°-5° high. Lowest leaves 4'—6' long, - 
1" wide. Rays pale purple. Achenia pubescent. : 
17. ERIGERON, L. FLEABANE. 
Heads mostly hemispherical, many-flowered. Rays very numerous, pistillate. 
Scales of the involucre nearly equal, in 1-2 rows. Receptacle flat, naked. 
Achenia compressed. Pappus a single row of capillary bristles; or with an 
outer row of short chaffy scales or bristles. — Herbs. Leaves alternate. Rays 
white or lish. x 
kie * Pappus double. : 
1. E. strigosum, Muhl. Annual, rough-pubescent; stem slender, corym- - 
bose-panicled above ; leaves entire or sparingly serrate, the lowest oblong, tapet- 
ing into a slender petiole, the upper lanceolate or linear, sessile, distant; heads 
small, corymbose-panicled ; rays white or rose-color ; outer pappus short and 
chaffy. — Dry old fields, common. June. — Stem 2° high. 2 
* * Pappus single. 
* Annual: rays shorter than the disk. (n 
2. E. Canadense, L. Hirsute or smoothish ; stem much branched; | 
leayes linear-lanceolate ; heads very numerous, in panicled racemes, small, cy- 
lindrical; rays white; disk-flowers 4-toothed. — Old fields, common. May- 
Sept. — Stem 19 - 39 high. d 
| + + Perennial : -rays conspicuous. ao ae 
* X Philadelphicum, L. Hairy; stem corymbose-branched abové; — — 
leaves thin, toothed or entire; the lowest spatulate-oblong ; the upper oblong: 
lanceolate, clasping ; rays very numerous and narrow, purplish. (E. quercifo- 
lium, Zam., with the lowest leaves pinnately toothed.) — Low ground, Florida, 
and northward. May.— Stem 29 — 4° high. a 
4. E. bellidifolium, Muhl. Hairy or villous; stem simple; lowest 
leaves spatulate or obovate, toothed above the middle ; the upper oblong, sessile 
and entire; heads large, solitary or corymbose ; rays broadly linear, bluish-pu* — 
ple. — Open woods and banks in the upper districts. March and April. — Stem 
1? high, stoloniferous, ; X oe 
.  ,5. E. vernum, Torr. & Gray. Smooth or nearly so; stem simple, scap™ _ 
= like ; radical leaves clustered, thick, spatulate or obovate, entire or slightly 
toothed ; the others small and remote ; heads corymbed ; rays (about 30) white- 
(E. nudicaule, Michz.) — Pine-barren swamps, Florida to North Carolina, and 
westward. March and April. — Rhizoma thick. Stem 1°-2° high. 
