General: Hartweg's Twinevine (Funastrum cynanchoides ssp. heterophyllum) is a vine with arrowhead shaped leaves and purple, milkweed flowers.

Hartweg's Twinevine is an uncommon component of desert and upland vegetation communities. It can be found on flats, in and along washes, and on bajadas into the lower mountains in the Lower Sonoran (Creosote-Bursage Flats) and Upper Sonoran (Mojave Desert Scrub and Pinyon-Juniper Woodland) life zones. The species also occurs in disturbed areas, such as along roads.

Family: Milkweed (Asclepiadaceae)

Other Names: Funastrum cynanchoides var. hartwegii, Funastrum heterophyllum, Sarcostemma cynanchoides ssp. hartwegii, Sarcostemma cynanchoides var. hartwegii

Plant Form: Vine

Height:

Stems:

Leaves: Opposite, elongate, arrowhead shaped, generally without hairs.

Flowers: Purple

Seeds:

Habitat: Dry soils on flats, in and along washes, and on bajadas into the lower mountains.

Elevation: To about 4,000 feet

Distribution: California to Texas.

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