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Tanacetum (name of doubtful derivation). Compositae. Annual or perennial herbs which are odorous: lvs. alternate, variously cut: heads of small to medium-sized yellow fls. disposed in corymbs, or rarely solitary, heterogamous, disk-shaped; female fls. with 3-5- toothed, tubular corollas: achenes 5-ribbed or 3-5- angular, with a broad truncate summit, bearing a coroniform pappus or none.—Thirty-five species scattered about the northern hemisphere, of which about 7 are native to N. Amer. For cult., see Tansy.
Tanacetum (name of doubtful derivation). Compositae. Annual or perennial herbs which are odorous: lvs. alternate, variously cut: heads of small to medium-sized yellow fls. disposed in corymbs, or rarely solitary, heterogamous, disk-shaped; female fls. with 3-5- toothed, tubular corollas: achenes 5-ribbed or 3-5- angular, with a broad truncate summit, bearing a coroniform pappus or none.—Thirty-five species scattered about the northern hemisphere, of which about 7 are native to N. Amer. For cult., see Tansy.
T. adenanthum, Diels. Plant densely tufted, 6-12 in. high: lvs. finely divided, clothed with white silky hairs: fl.-heads about 1/4 in. across. W. China.—T. quercifolium, W. W Smith. Lower lvs. 4-6 in. long: fl.-heads containing about 20 yellow florets. Yunnan.
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