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Calystegia

Calystegia is a genus of about 25 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.

Description
They are annual or herbaceous perennial twining vines growing 1–5 m tall, with spirally arranged leaves. The flowers are trumpet-shaped, 3–10 cm diameter, white or pink, with (in most species) a sometimes inflated basal epicalyx. 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. ==Taxonomy==
Taxonomy
It was described by Robert Brown in 1810. this refers to the large bracts that cover the sepals. Species The following species are recognised in the genus Calystegia: • Calystegia affinisCalystegia atriplicifolia – nightblooming false bindweed • Calystegia binghamiaeCalystegia brummittiiCalystegia catesbiana – Catesby's false bindweed • Calystegia collina – Coast Range false bindweed • Calystegia felixCalystegia hederacea – Japanese false bindweed • Calystegia × howittiorumCalystegia × krauseanaCalystegia longipes – Paiute false bindweed, plateau morning glory • Calystegia × lucanaCalystegia macaunii – Macoun's false bindweed • Calystegia macrostegia – island false bindweed • Calystegia malacophylla – sierra false bindweed • Calystegia marginata – small-flowered white bindweed New Zealand • Calystegia × melnikovaeCalystegia occidentalis – chaparral false bindweed • Calystegia peirsonii – Peirson's false bindweed • Calystegia pellita – hairy false bindweed • Calystegia pubescensCalystegia × pulchra – hairy bindweed • Calystegia purpurata – Pacific false bindweed • Calystegia × scaniaCalystegia sepium – large bindweed, hedge bindweed, bearbind, hedgebell (type species) • Calystegia silvatica – great bindweed, shortstalk bindweed • Calystegia soldanella – sea bindweed, seashore false bindweed, beach morning glory • Calystegia spithamaea – low false bindweed, upright bindweed • Calystegia stebbinsii – Stebbins' false bindweed, Stebbins' morning glory • Calystegia subacaulis – hillside false bindweed • Calystegia tuguriorum – New Zealand bindweed, pōuwhiwhi, pōwhiwhi, rarotawake • Calystegia vanzuukiae File:DSCM1934_Helix_Zaunwinde.jpg File:Flore des serres et des jardins de l'Europe (8595873042).jpg|Calystegia sepium (van Houtte, L., 1853) ==Ecology==
Ecology
Some of the species, notably Calystegia sepium and C. 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 eaten by the larvae of some Lepidoptera species including Bedellia somnulentella (recorded on C. sepium) and small angle shades. ==References==
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