Calystegia (bindweed; family Convolvulaceae) A genus of herbaceous and woody plants which have long, trailing, and twining stems. They have alternate, simple leaves without stipules. The regular flowers are bisexual with an involucre of large bracteoles below the calyx. There are 5 sepals, and 5 petals fused to form a funnel or bell shape. The stamens are attached to the corolla base. The flowers are generally large and axillary. The ovary is superior, with 2 fused carpels and 2 locules, each with 2 ovules. The fruit is a dehiscent capsule containing hairy seeds with large, folded cotyledons. There are about 25 species, some of which are grown as ornamentals, found in temperate and subtropical regions of the world.
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