2. H. acutíloba, DC. Leaves with 3 ovate and pointed lobes, or sometimes 5-lobed; those of the involucre acute or acutish.--Passes into the other and has the same range. 4. ANEMONÉLLA, Spach. Involucre compound, at the base of an umbel of flowers. Sepals 5--10, white and conspicuous. Petals none. Achenes 4--15, ovoid, terete, strongly 8--10-ribbed, sessile. Stigma terminal, broad and depressed.--Low glabrous perennial; leaves all radical, compound. 1. A. thalictroìdes, Spach. (RUE-ANEMONE.) Stem and slender petiole of radical leaf (a span high) rising from a cluster of thickened tuberous roots; leaves 2--3-ternately compound; leaflets roundish, somewhat 3-lobed at the end, cordate at the base, long-petiolulate, those of the 2--3-leaved 1--2-ternate involucre similar; flowers several in an umbel; sepals oval (½´ long, rarely pinkish), not early deciduous. (Thalictrum anemonoides, _Michx._)--Woods, common, flowering in early spring with Anemone nemorosa, and considerably resembling it. Rarely the sepals are 3-lobed like the leaflets. 5. THALÍCTRUM, Tourn. MEADOW-RUE. Sepals 4--5, petal-like or greenish, usually caducous. Petals none. Achenes 4--15, grooved or ribbed, or else inflated. Stigma unilateral. Seed suspended.--Perennials, with alternate 2--3-ternately compound leaves, the divisions and the leaflets stalked; petioles dilated at base. Flowers in corymbs or panicles, often polygamous or diœcious. (Derivation obscure.) [*] _Flowers diœcious or sometimes polygamous, in ample panicles; filaments slender; stigmas elongated, linear or subulate; achenes sessile or short-stipitate, ovoid, pointed, strongly several-angled and grooved._ 1. T. diòicum, L. (EARLY MEADOW-RUE.) Smooth and pale or glaucous, 1--2° high; leaves (2--3) all with general petioles; leaflets drooping, rounded and 3--7-lobed; flowers purplish and greenish, diœcious; the yellowish anthers linear, mucronate, drooping on fine capillary filaments.--Rocky woods, etc.; common. April, May. 2. T. polýgamum, Muhl. (TALL M.) Smooth, not glandular, 4--8° high; stem-leaves sessile; leaflets rather firm, roundish to oblong, commonly with mucronate lobes or tips, sometimes puberulent beneath; panicles very compound; flowers white, the fertile ones with some stamens; anthers not drooping, small, oblong, blunt, the mostly white filaments decidedly thickened upwards. (T. Cornuti, _Man._, not _L._)--Wet meadows and along rivulets, N. Eng. to Ohio and southward; common. July--Sept. 3. T. purpuráscens, L. (PURPLISH M.) Stem (2--4° high) usually purplish; stem-leaves sessile or nearly so; leaflets more veiny and reticulated beneath, with or without gland-tipped or glandless hairs or waxy atoms; panicles compound; flowers (sepals, filaments, etc.) greenish and purplish, diœcious; anthers linear or oblong-linear, mucronulate, drooping on capillary filaments occasionally broadened at the summit.--Dry uplands and rocky hills, S. New Eng. to Minn., and southward. May, June.