2. E. fœniculàceum, Willd. (Dog-Fennel.) Smooth or nearly so, paniculately much-branched (3–10° high); leaves 1–2-pinnately parted, filiform.—Va., near the coast, and southward. Adv. near Philadelphia.
[+][+] Leaves long-petioled, the upper ones alternate; heads 12–15-flowered, in compound corymbs.
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.