Gonolobus suberosus (L) R. Brown
Apocynaceae (Dogbane) Family
Red-spotted Purple Butterfly visiting the Climbing Milkweed
Climbing Milkweed may also be known as Anglepod, Blue-Vine, Honey Vine, Sand Vine or Spiny Pod. Note: The name Spiny Pod is usually reserved for the coastal varieties, which have a spiny seed pod.
The plant is a twining, smooth perennial with milky sap typical of the milkweed. Its preferred habitat is waste sites, thickets, alluvial woods and swamp forests. Distribution is throughout the Escambia region except directly at seashore.
The leaves are opposite on the stem, 3 to 5 inches long, heart-shaped and attached to a leaf stalk between the lobes. The tip of the leaf tapers to a long or short point and is sometimes pinched, which sets it off abruptly from the broad end of the leaf. This arrangement may cause the leaf to have a wavy margin.
Flowers are on long stalks, in umbel-like clusters and arise from the leaf axil. Each flower is bisexual in nature and symmetrical in form. The corolla is yellow to orange-brown, maroon or nearly black. Chief pollinators are flies and butterflies. Flowers occur in the summer.
Fruit is an angled pod, 3 to 5 inches long, containing more than one seed and splits along the seam at maturity (follicle).