Convolvulus

The genus Calystegia, until recently widely accepted, has been shown to be genetically embedded within Convolvulus,^[6] and is now treated as a synonym of it by the Plants of the World Online database.^[5]

They are annual or perennial herbaceous vines; a few species are woody shrubs. They grow to heights of 0.3–4 m scrambling through ground vegetation, shrubs and trees; the shrubby species (e.g. C. cneorum) growing to 0.5 m tall with a woody base. The leaves are spirally arranged, and the flowers trumpet-shaped, mostly white or pink, but blue, violet, purple, or yellow in some species.^[7]

Many of the species are invasive weeds; but others are cultivated for their attractive flowers, while some are globally threatened.^{[citation needed]}

Convolvulus species are used as food plants by the larvae of some Lepidoptera species, including the convolvulus hawk moth, the sweet potato leaf miner (Bedellia somnulentella) and the gem; the leaf miner Bucculatrix cantabricella feeds exclusively on C. cantabricus.^{[citation needed]}

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  Convolvulus dorycnium
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  Convolvulus sabatius
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  Cultivated Convolvulus tricolor
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  Convolvulus althaeoides
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  Convolvulus arvensis
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  Convolvulus cneorum in Catalonia, Spain
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  Convolvulus cephalopodus in Behbahan
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  Seed under a microscope