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+ + Heads 3 to 6-flowered, small (4 to 6 mm. long): Teaves (at least the lowest) pins 
nately dissected: involucral bracts 6 to 10, nerveless. 
5. E. coronopifolium Willd. Puberulent or pubescent, somewhat glutinous, very 
leafy herbs, 9 to 12 dm. high: lower leaves mostly opposite, twice 3 to 7-parted into 
linear entire or sparingly incised lobes; upper less compound, uppermost often entire, 
from broadly to narrowly linear: the very numerous heads of white flowers race- 
mosely and thyrsoidly paniculate: involucral bracts acute or abruptly pointed, nar- 
rowly scarious-margined.—Dry soil, extending into Texas from the Gulf States. 
~ + + Heads 8 to 15-flowered, 6 to 10 mm. long: leaves undivided: flowers mostly white: 
involucre of rather few (8 to 15) bracts. 
+ Suffruticose: inflorescence thyrsoid-paniculate: involucral bracts 13-nerved. 
6. E. solidaginifolium Gray. Glabrate or minutely pubescent, 3 to 6 dm. high: 
leaves opposite, very short-petioled, oblong- or narrowly ovate-lanceolate from a 
rounded base, acute, entire or obscurely dentate, 2 to 3.5 cm. long: thyrsus usually 
small (5 to 7.5 cm. long), sometimes large (15 to 20 cm. long and equally broad at 
base), leafy at base: heads 3 to 5-flowered: involucral bracts linear-lanceolate, 
acute: achenes pubescent.—Dry hills, west of the Pecos. 
++ ++ Herbaceous perennials: inflorescence cymose or fastigiate: involucral bracts nerve- 
less or nearly 8o. 
= Leaves conspicuously petioled from a mostly truncate or abrupt base, strongly serrate. 
7. EB. serotinum Michx. Puberulent: stems 15 to 20 dm. high: leaves obloug- or 
ovate-lanceolate, acute or acuminate, 7.5 to 15 cm. long, many of the upper alternate: 
heads 7 to 15-flowered, very numerous: involucral bracts linear-oblong, very obtuse, 
cinereous-pubescent.—Low grounds, extending into Texas at least as far west as Gil- 
lespie County. 
= = Leaves from linear to oblong, sessile or some short-petioled from a narrowed base, 
chiefly opposite: heads mostly 5-flowered : involucre canescently pubescent. 
8. EB. hyssopifolium L. Merely puberulent: stems about 6 dm. high, very leafy, 
commonly with axillary fascicles: leaves occasionally verticillate, linear, obtuse, 
entire or sparingly dentate, 2 to 5 em. long: involucre 6 mm. long.—Dry soil, in 
eastern and southern Texas. 
9. BH. semiserratum DC. Tomentulose-pubescent: stems 6 to 9 din, high: leaves 
oblong-lanceolate, mostly acute or acaminate, 5 to 7.5m. long, serrate with numer- 
ous unequal teeth above or below the middle to the apex, 3-nerved, rather veiny: 
involucre 4mm. long, the longer bracts linear-oblong.—A species of the Southern 
States, extending into Texas, Var, LANCIFOLIUM Gray is glabrate, with lanceolate to 
linear rather rigid leaves 3-nerved from near the base. 
10. BE. altissimum L. Pubescent: stems 12 to 20 dm. high, very leafy: leaves lan- 
ceolate, tapering gradually to both ends, acuminate, acutely serrate above the mid- 
dle, 5 to 10 cm. long, with 3 conspicuous parallel nerves ; uppermost entire: involu- 
cre 6 mm. long, the bracts oblong.—Eastern and southern Texas. 
— = = Leaves sessile or very short-petioled with a broad base: involucre pubescent, 
11. E. rotundifolium L. Stem strict, corymbose at summit, 3 to 9 dm, high, 
herbage roughish-pubescent: leaves round-ovate, obtuse or abruptly acute, with a 
truncate or obscurely cordate base, regularly and closely crente-dentate, veiny (larger 
5 em. long): cymes dense.—Extending from the barrens of the Gulf region into Texas, 
Var. SCABRIDUM Gray is a form with smaller and more scabrous or cinereous leaves, 
the upper and sometimes all with cuneate base. 
+++ + Heads 24 to 30-flowered, hardly over 4 mm. long: involucral bracts of 3 
lengths, obtuse, thin, conspicuously few-nerved. 
12. EB. pycnocephalum Less. Pubescent or nearly glabrous: stems slender, 3 to 
6 dm. high: leaves thin, deltoid-ovate or subcordate, acute or acuminate, coarsely 
