Alcea three centimeters wide and may be pink, white, purple, or yellow. The fruit is a schizocarp, a dry disc divided into over 15 sections that contain seeds. There are about 60 species of "Alcea", including: Hollyhocks are popular garden ornamental plants. They are easily grown from seed. Breeds with red flowers attract hummingbirds and butterflies. Cultivars have been bred, especially from "A. rosea". They include the double-flowered 'Chater's Double', the raspberry-colored 'Creme de Cassis', and 'The Watchman', which has dark, nearly black, maroon flowers. The stems of hollyhocks can be used as firewood, and the roots have been used medicinally.
Rhodopetala rosea solely on shell characteristics), Lindberg proposed the creation of a new subfamily within the Acmaeidae to be called "Rhodopetaleinae" with this species as its only member. It is distinguished from the other subfamilies of this family by its helcioniform rather than conical shell, a silvery metallic luster in its central area rather than a porcelaneous quality, and the presence of a rudimentary gill lacking ctenidial structures. It is the combination of the shell structure (patellid) and anatomy (acmaeid) which suggest this is an intermediary group between the acmaeid and cellanid limpets. Rhodopetala rosea Rhodopetala rosea, common name the pink limpet,