3. E. serótinum, Michx. Stem pulverulent-pubescent, bushy-branched (3--7° high); leaves ovate-lanceolate, tapering to a point, triple-nerved and veiny, coarsely serrate (3--6´ long); involucre very pubescent.--Alluvial ground, Md. to Minn., E. Kan., and southward. [+][+][+] _Leaves sessile or nearly so, with a narrow base, mostly opposite; heads mostly 5-flowered._ [=] _Involucral scales with white and scarious acute tips._ 4. E. álbum, L. _Roughish-hairy_ (2° high), _leaves oblong-lanceolate, coarsely toothed, veiny_; heads clustered in the corymb; _involucral scales_ closely imbricated, rigid, narrowly lanceolate, _longer than the flowers_.--Sandy and barren places, pine barrens of Long Island to Va., and southward. Var. subvenòsum, Gray. Less rough; leaves 1--2´ long, finely toothed and less veiny.--Long Island and N. J. 5. E. leucólepis, Torr. & Gray. Minutely pubescent, simple (1--2° high); _leaves linear-lanceolate, closely sessile, 1-nerved_, obtuse, _minutely serrate, rough both sides_; corymb hoary.--Sandy bogs, Long Island, N. J., and southward. [=][=] _Scales not scarious or obscurely so, obtuse, at length shorter than the flowers._ 6. E. hyssopifòlium, L. Minutely pubescent (1--2° high); _leaves narrow, linear or lanceolate_, elongated, obtuse, 1--3-nerved, entire, or the lower toothed, often crowded in the axils, _acute at the base_.--Sterile soil, Mass. to Va., E. Ky., and southward. Var. laciniàtum, Gray. Leaves irregularly and coarsely toothed or laciniate.--Penn., Ky., and southward. 7. E. semiserràtum, DC. Minutely velvety-pubescent, branching (2--3° high); _leaves lanceolate or oblong, triple-ribbed and veiny_, serrate above the middle, _tapering to the base_, the lower slightly petioled; heads small. (E. parviflorum, _Ell._)--Damp soil, Va. to Ark., and southward.--Leaves sometimes whorled in threes, or the upper alternate. 8. E. altíssimum, L. Stem stout and tall (3--7° high), _downy; leaves lanceolate, tapering at both ends, conspicuously 3-nerved_, entire, or toothed above the middle, the uppermost alternate; corymbs dense; _scales of the involucre obtuse_, shorter than the flowers.--Dry soil, Penn. to Minn. and Ky.--Leaves 3--4´ long, somewhat like those of a Solidago. [+][+][+][+] _Leaves sessile or nearly so, with a broad base, opposite or in threes; heads pubescent._ [=] _Heads 5--8-flowered; leaves not clasping._ 9. E. teucrifòlium, Willd. Roughish-pubescent (2--8° high); _leaves ovate-oblong and ovate-lanceolate_, obtuse or truncate at base, slightly triple-nerved, veiny, _coarsely toothed or incised toward the base, the lower shortly petioled, the upper alternate_; branches of the corymb few, unequal; _scales of the involucre oblong-lanceolate, at length shorter than the flowers_.--Low grounds, Mass. to Va., and southward near the coast.