166 45. COMPOSITA. 
florets short ovate, female fi. truncate obliquely.— Tussilago Pe- 
tasites Sm., E. B. 431 and 430. S¢, 2. 13.—Thyrsus long and 
lax in the female plant, ovate and dense in the male. Root 
thick, creeping extensively. Fi. appearing before the 1., on stout 
erect stalks which are clothed with concave tumid petioles either 
leafless or with a small limb. L. very large, radical, ultimately 
we 3 feet broad, glabrous above——Swamps. P.IV. Butter- 
r. 
(P. fragrans (Presl) which has shortly ligulate female fl. is 
quite naturalized in some places in the South. 
3. TussiLtaco Linn. 
1. T. Farfara (L.)—E. B. 429. St. 2. 10.—Root creeping ex- 
tensively. FI. appearing before. the |., in bright yellow solitary 
heads, erect in blossom and seed, drooping before and after 
flowering, their stalks clothed with scalelike smooth bracts. L. 
roundish-cordate,angular,toothed, downy beneath.— Moist chalky 
and clay soils. P. WI. 1V. Coltsfoot. 
Tribe II. Asteroidee. 
Style of the hermaphrodite florets cylindrical with lmear 
branches which are flat and equally and minutely downy on the 
outer surface and have narrow promiment stigmatic lines 
throughout. 
Section 1. ERIGERINE. Heads never dicecious, mostly 
radiant. Anth. without appendages. L. alternate. 
4, (8.) Aster Linn. 
1. A. Tripolium (L.); st. glabrous corymbose, 1. linear-lan- 
ceolate fleshy smooth, mvolucre imbricate, phyll. obtuse mem- 
branous the inner ones longer.—E. B. 87. Tripolium vulgare 
DC.—St. 1—2 feet high, erect, hollow, leafy, many-flowered. 
Heads large with a yellow disk and bright blue rays; rays often 
wanting.—Muddy salt marshes. P. VIII. IX. 
5. (9.) Ericeron Linn. 
*1. E. canadensis (L.); st. much branched hairy panicled 
many-flowered, 1. linear-lanceolate ciliated —E. B. 2019.—St. 
erect, 1—2 feet high. Heads numerous, small, yellowish. In- 
volucres cylindrical, scarcely shorter than the florets of the ray, 
finally spreading — Waste ground, rare. A. VIII. IX. E. 
2. E. acris (L.); st. corymbose, branches alternate 1-headed, 
1. linear-lanceolate entire spreading, lower |. narrowed below, ray 
erect scarcely longer than the disk, mer female florets filiform 
