American groundnut

Apios americana

''Apios americana'', sometimes called the American groundnut is a perennial vine that bears edible beans and large edible tubers. Its natural range is from Southern Canada down through Florida and West as far as the border of Colorado.
American groundnut -  Apios americana This plant has fleshy tubers that were an important food for Native Americans.  It also has small extra-floral nectaries on the inflorescence that are visited by ants.

Habitat: It was growing wrapped up with sumac along the edge of a meadow.
https://www.jungledragon.com/image/69912/american_groundnut_-_apios_americana.html American groundnut,Apios americana,Geotagged,Summer,United States

Appearance

Its vine can grow to 1–6 m long, with pinnate leaves 8–15 cm long with 5–7 leaflets. The flowers are usually pink, purple, or red-brown, and are produced in dense racemes 7.5–13 cm in length. The fruit is a legume 5–13 cm long. Botanically speaking, the tubers are rhizomatous stems, not roots.

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Taxonomy
KingdomPlantae
DivisionAngiosperms
ClassEudicots
OrderFabales
FamilyFabaceae
GenusApios
SpeciesA. americana