Perennial peavine, Perennial pea, or Everlasting sweet pea

Description:

Lathyrus latifolius has winged hairless stems, and alternating blue green compound leaves consisting of a single pair of leaflets and a winged petiole about 2" long. The leaflets are narrowly ovate or oblong-ovate, smooth along the margins, hairless and up to 3" long and 1" across. There is a branched tendrils between the leaflets.

Habitat:

It requires partial to full sun, and loam or clay-loam soil that is moist, mesic, or slightly dry. It is less strongly-scented than the related annual sweet pea, Lathyrus odoratus, with which it may be confused. While grown as a garden plant it may be pervasive and difficult to remove. Because of this, this species is often considered to be a weed despite its attractive appearance.