"Family: Convolvulaceae (morning glories)

Description
Instantly recognizable as a type of morning glory, hedge bindweed is common in disturbed habitats and can be a serious agricultural weed. Hedge bindweed is a creeping, climbing, and twining perennial vine with smooth stems and leaves, spreading by deep roots.

The flowers are on long peduncles from the leaf axils, large, funnel-shaped, to 2˝ inches long, white or sometimes pink with a few white stripes on the inside. Each flower is subtended by bracts that usually overlap only toward the base; the bracts are usually sharply pointed. The flowers close by noon on sunny days. The flowers are usually solitary (sometimes in pairs)."
To read more: https://mdc.mo.gov/discover-nature/field-guide/hedge-bindweed

Blooms May–September.