Canyon Grape
Vitis arizonica

Family: Grape (Vitaceae)
AKA: Arizona Grape
Photo taken on: October 11, 2010
Location: Bandelier National Monument, NM
Life Zones: Plains to foothills
Habitat: Canyons, riverbanks

A vine with woody stems rambling to 16ft. Leaves are heart-shaped and coarsely toothed. Tiny greenish flowers grow in long clusters and produce juicy dark purple grapes that are edible, although tart and seedy, but very popular with birds.

Flora of North America reference.

Photo of flowers below from fireflyforest.com