1.2- Tribe Convolvulaceae Dumort. (1827) + Overview Tribe Convolvuleae Dumort. (1827) is in the Family Convolvulaceae, in the Order Solanales of flowering plants (Angiosperms). Tribe Convolvuleae has 4 genera and 375 species, temperate and tropical regions. Annual or perennial herbs to shrubs or herbaceous or woody climbers. The leaves are cordate at the base or not. The inflorescence is cymose, sometimes capitate or paniculate or reduced to solitary axillary flowers. Sepals are equal or not. There is a single style, bearing a stigma with 2-4 linear, tongue-shaped or clavate lobes. The fruit is a capsule with 4-8 valves or breaking up irregularly. + Genera: 1- Genus Calystegia (26 species). 2- Genus Convolvulus (221 species). 3- Genus Jacquemontia (120 species). 4- Genus Polymeria (10 species). Jacquemontia is placed somewhat removed from the other genera in the molecular analysis, but is so close to Convolvulus morphologically that it is difficult to define clearly.
2- Taxonomy of the Tribe Convolvuleae
2.1- Genera CalystegiaR.Br. + Overview Calystegia (bindweed, false bindweed, or morning glory) is a genus of about 26 species of flowering plants in the bindweed family Convolvulaceae. The genus has a cosmopolitan distribution in temperate and subtropical regions, but with half of the species endemic to California. They are annual or herbaceousperennial twining vines growing to 1-5 m tall, with spirally arranged leaves. The flowers are trumpet-shaped, 3-10 cm diameter, white or pink, with a sometimes inflated basal calyx. The genus bears much similarity to a related genus Convolvulus, and is sometimes combined with it; it is distinguished primarily by the pollen being smooth, and in the ovary being unilocular. Some of the species, notably Calystegia sepium and Calystegia silvatica, are problematic weeds, which can swamp other more valuable plants by climbing over them, but some are also deliberately grown for their attractive flowers. Calystegia species are used as food plants by the larvae of some Lepidoptera species including Bedellia somnulentella (recorded on Calystegia sepium) and Small Angle Shades. The name is derived from two Greek words kalux, "cup", and stegos, "a covering", meaning "a covering cup". The stem is creeping over the ground, not winding or hardly winding. The leaves are dark green and reniform. The petioles are ovate or elleptical. The corolla is pink or pale purplish, with 5 white stripes.