Field bindweed Convolvulus arvensis L.
Family: Convolvulaceae (Morningglory family)
Life cycle: Perennial, reproduces by seed and deep vegetative rootstocks
Native status: Introduced
Habitat: Crop fields, fence lines, landscapes
General description: Twining, herbaceous vine with alternate, lanceolate leaves. Leaves of field bindweed typically are smaller than those of hedge bindweed. White, funnel-shaped flower with two small bracts on flower stalk. Produces an extensive network of underground rootstocks.
Key ID traits: Base of leaves without distinct lobe; small bracts on flower stalk (pedicel) is separate from flowers.
Similar species: Hedge bindweed generally has larger leaves with basal lobes; wild buckwheat is an annual and has ochrea at the base of leaf petioles and inconspicuous flowers; honeyvine milkweed has opposite leaves; morningglory species in Iowa either have heart-shaped (tall) or three-lobed (ivyleaf) leaves.
Miscellaneous: Field bindweed is more aggressive in crop fields than hedge bindweed; it was one of the most severe weeds in Iowa prior to introduction of synthetic herbicides. Frequently called creeping Jenny.