Island Morning Glory

Calystegia macrostegia is a species in the Convolvulaceae (Morning Glory) family known by the common name Island Morning Glory. It is found on the Channel Islands and also on the mainland coast from Monterey County southward into Baja, Mexico. It is a woody perennial vine which may be a low and herbaceous or a stout, climbing plant which can approach 9 meters in length. The triangular leaves may be over 10 centimeters wide. It blooms over a long period, producing white to very pale pink blooms with corollas 2 to over 6 centimeters wide.

There are six recognized subspecies with overlapping ranges. There is also a commonly available horticultural variety known as 'Anacapa Pink'. It works best with a fence, trellis or something it can climb on, but can also be used as a ground cover. It grows so vigorously that it may need to be cut back annually. Plant in full sun along the coast. Inland give afternoon shade and additional water.