Heads many-flowered, nearly discoid; flowers all fertile, the marginal chiefly pistillate and 3--5-toothed. Involucre imbricated, dry. Receptacle convex, naked. Achenes angled or ribbed, with a large flat top; pappus a short crown.--Bitter and acrid strong scented herbs (ours perennial), with 1--3-pinnately dissected leaves, and corymbed heads. Flowers yellow; in summer. (Name of uncertain derivation.) T. VULGÀRE, L. (COMMON TANSY.) Stem (2--4° high) smooth; leaflets and the wings of the petiole cut-toothed; corymb dense; pistillate flowers terete, with oblique 3-toothed limb; pappus 5-lobed.--Var. CRÍSPUM has the leaves more cut and crisped.--Escaped from gardens to roadsides; Atlantic States. (Nat. from Eu.) 1. T. Huronénse, Nutt. Hairy or woolly when young, stout (1--3° high); lobes of the leaves oblong; heads large (½--{2/3}´ wide) and usually few; pistillate flowers flattened, 3--5-cleft; pappus toothed.--St. John's River, Maine (_G. L. Goodale_), shores of the upper Great Lakes, and westward. 71. ARTEMÍSIA, L. WORMWOOD. Heads discoid, few--many-flowered; flowers all tubular, the marginal ones pistillate, or sometimes all similar and perfect. Involucre imbricated, dry and scarious. Receptacle small and flattish, naked. Achenes obovoid, with a small summit and no pappus.--Herbs or shrubby plants, bitter and aromatic, with small commonly nodding heads in panicled spikes or racemes; flowering in summer. Corolla yellow or purplish. (Ancient name of the Mugwort, in memory of _Artemisia_, wife of Mausolus.) § 1. _Receptacle smooth; marginal flowers pistillate and fertile; disk-flowers perfect but sterile, the style mostly entire; root perennial, except in n. 1._ [*] _Leaves dissected._ 1. A. caudàta, Michx. Smooth (2--5° high); upper leaves pinnately, the lower 2--3-pinnately divided; _the divisions thread-form_, diverging; _heads small, the racemes in a wand-like elongated panicle_; root biennial.--Sandy soil, coast of N. H. to Va.; also Mich. to Minn., and southward. 2. A. Canadénsis, Michx. Smooth, or hoary with silky down (1--2° high); lower leaves twice-pinnately divided, the upper 3--7-divided, _the divisions linear, rather rigid; heads rather large, in panicled racemes_.--Northern N. Eng. to the Great Lakes, Minn., and northward. (Eu.) [*][*] _Leaves entire or some 3-cleft._ 3. A. dracunculoìdes, Pursh. Tall (2--5°), somewhat woody at base, slightly hoary or glabrous; leaves linear and entire or the lower 3-cleft; heads small and numerous, panicled.--Sandy banks of streams, Minn. to Ill., Mo., and westward. 4. A. glaùca, Pall. Strict, 1--2° high, somewhat woody at base, minutely silky-pubescent or glabrate; leaves linear- to oblong-lanceolate; heads as in the last.--Sask. to Minn. (Sib.) 5. A. filifòlia, Torr. Suffruticose, finely canescent, 1--3° high; leaves all filiform, the lower commonly 3-parted; heads very small and numerous, crowded in a long leafy panicle.--Central Kan. to Neb., and southwestward.