A genus of about 120 species of flowering plants in the buttercup family Ranunculaceae in the north and south temperate zones. They are closely related to Pasque flowers (Pulsatilla) and Hepaticas (Hepatica); some botanists include both of these genera within Anemone.

Anemone are perennial herbs, growing from rhizomes, caudices, or tubers. Species have basal leaves with long petiole stems that can be upright or prostate, the foliage is simple or compound with lobed, parted, or undivided leaf blades. The leaf margins are entire or toothed. The flowers are produced in terminal inflorescences with involucres, and they can be arranged in two-to-nine-flowered cymes or in umbels, or be solitary. They have involucral bracts that can be leaf-like and/or petal-like. The flowers are bisexual and are radially symmetrical with 10 to 200 stamens. The flowers have nectaries, and many simple pistils, but petals are missing in the majority of species. The pistils have one ovule. The 4 to 27 sepals can be white, purple, blue, green, yellow, pink, or red and wither away during fruit growth. The fruits are ovoid to odovoid shaped achenes that are collected together in a tight cluster, ending variously lengthened stalks; though many species have sessile clusters terminating the stems. The achenes are beaked and some species have feathery hairs attached to them.

from: Wikipedia