Convolvulus macrostegius Calystegia macrostegia, with the common names island false bindweed and island morning glory, is a species of morning glory in the family Convolvulaceae.

It is found on all the Channel Islands, source of its common names.

Calystegia macrostegia is a woody perennial herb or small shrub which may be a low herbaceous vine or a stout, woody, climbing plant which can approach 9 metres (30 ft) in length.

The vine produces white, to very pale pink, to lavender blooms, often according to drought or temperature.

Subspecies include:[1][2] Calystegia macrostegia is cultivated as an ornamental plant, used as a vine and groundcover in native plant, drought tolerant, and wildlife gardens.