Virginia Tech Weed Identification Guide

Cotton Morningglory: Ipomoea cordatotriloba

cottonmg3-12.jpg (166417 bytes) Weed Description: Weak perennial, low climbing or trailing vine with lavender flowers.  Found in the lower southeastern Gulf states to Texas.

Seedling:  Cotyledons deeply indented, without hairs.

Roots:  At first a conventional taproot, overwinters from a long-lived, branched rootstock.

Leaves:  With a continuous, untoothed margin, either heart-shaped (cordate) or deeply 3- to 5-lobed, 1 1/2 to 3 1/2 inches long, 3/4 to 2 inches wide, with a long, tapering point and concave sides.  Sepals and leaves without hairs. cottonmg4-6.jpg (154651 bytes)
cotton9-20d.jpg (149417 bytes)  

Flowers:  Rosy lavender with a dark center, approximately 1 1/4 to 2 1/4 inches long.

Fruit:  Small, brown, globoid, hairy capsule, 6-9 mm broad.

Stems: Twining to low-climbing vine, branched, without hairs.

cotton7-16b.jpg (83328 bytes)
cottonmg9-24b.jpg (78512 bytes) Identifying Characteristics: This weed is often confused with sharppod morningglory (Ipomoea trichocarpa var. trichocarpa).   However, sharppod morningglory has sepals, leaves and stems that may be pubescent, while these areas are not pubescent in cotton morningglory.