Sonoran Desert Naturalist >>> Field Guide >>> Sonoran Desert Flora >>> Asclepiadaceae >>> Cynanchum arizonicum

Arizona Swallowwort

Cynanchum arizonicum

Pen & Ink Illustration © by Michael Plagens

Drawn from live specimen observed in the Goldfield Mountains, Maricopa County, Arizona.

VINE: Twining green stems use other plants as scaffold. The specimen from which the illustration was made grew upon a small saguaro cactus and was nearly engulfing it in growth. Broken stems exude copious white sap.

LEAVES: Leaves are narrow and somewhat thickened/fleshy. Margins may be revolute.

RANGE: Eastern portions of Sonoran Desert ranging into the Chihuahuan. Normally not very common and hard to find.

FRUIT: Fleshy, elongate pod eventually dries and splits to reveal seeds with silky hairs.

FLOWERS: Small inconspicuous flowers with yellow-white petals. Often flowers occur singly in the leaf axils.

UNARMED

Asclepiadaceae -- Milkweed Family

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Copyright Michael J. Plagens, 1999-2008