Herbs , perennial, from rhizomes, caudices, or tubers. Leaves basal, simple or compound, petiolate. Leaf blade lobed or parted or undivided, reniform to obtriangular or lanceolate, margins entire or variously toothed. Inflorescences terminal, 2-9-flowered cymes or umbels, or flowers solitary, to 60 cm; involucres present, often with primary involucres subtending inflorescences, and secondary and tertiary involucres subtending inflorescence branches or single flowers (primary, secondary, and tertiary involucres appearing to be in tiers), involucral bracts 2-7(-9), leaflike or sepaloid, distant from or close to flowers. Flowers bisexual, radially symmetric; sepals not persistent in fruit, 4-20(-27), white, purple, blue, green, yellow, pink, or red, plane, linear to oblong or ovate to obovate, 3.5-40 mm; petals usually absent (present in A . patens ), distinct, plane, obovate to elliptic, 1.5-2 mm; nectary present; stamens 10-200; filaments filiform or somewhat broadened at base; staminodes absent between stamens and pistils; pistils many, simple; ovule 1 per pistil; style present. Fruits achenes, aggregate, sessile or stalked, ovoid to obovoid, sides not veined; beak (persistent style) present, sometimes rudimentary, terminal, straight or curved, to 40(-50) mm, sometimes plumose. x =7 or 8.
Herbs perennial, rhizomatous. Leaves all basal, simple, palmate, ternate, or pinnate, sometimes reduced and scalelike, rarely absent. Scape erect or ascending; inflorescences cymose, sometimes umbellate. Bracts (2 or)3 or more, forming an involucre. Flowers actinomorphic. Sepals (4 or)5 or more, petaloid, white, yellow, blue, or purple. Petals absent. Stamens usually numerous, filiform or linear. Pistils several to numerous; ovary with 1 pendent ovule; style present or absent; stigma present or absent. Achenes ovoid or subglobose, rarely strongly bilaterally compressed.
"Sep 4–20, petaloid; pet none; pistils numerous, in a subglobose to cylindric head, pubescent; style short or elongate; stigma minute; achenes flattened, clavate, or fusiform, tipped with the persistent style; perennials from a rhizome or caudex, with palmately deeply divided basal lvs and an erect stem with a whorl of 3 or more involucral lvs subtending one or more elongate peduncles; fls medium-sized to large, white to blue or red or greenish. (Pulsatilla) 100+, N. Hemisphere."
Stamens indefinite in number, sometimes the outer ones staminodal
Carpels indefinite in number, uniovulate
Achenes with persistent, naked to plumose, styles.
Often with an involucre of a whorl of 3 leaves (often very much reduced) below the flower
Perennial herbs with lobed or dissected basal leaves
Sepals petaloid, variable in number
Fernald, M. L. 1928b. The North American species of Anemone § Anemonanthea. Rhodora 30: 180-188. Frodin, D.G. 1964. A Preliminary Revision of the Section Anemonanthea of Anemone in Eastern North America, with Special Reference to the Southern Appalachian Mountains. M.S. thesis. University of Tennessee. Hoot, S. B., A. A. Reznicek, and J. D. Palmer. 1994. Phylogenetic relationships in Anemone (Ranunculaceae) based on morphology and chloroplast DNA. Syst. Bot. 19: 169-200. Wang,W.-T. 1980. Anemone In: W.-T. Wang, ed. 1980. Flora Republicae Popularis Sinicae. Vol. 28, pp. 1-56.
|Windflower, anémone [etymology not clear: probably Greek anemos, wind; possibly from Naaman, Semitic name for Adonis, whose blood, according to myth, produced Anemone coronaria ]|