I am confident of this ID but would like confirmation.
This plant has oblong shape,and the leaves were approximately 3 inches long. It had long seed pods about 4 inches long.
I do not know what type of vine this plant is.
Note wide oval leaves and thick stem. Found on lower Madre Springs Trail.
Long narrow leaves, buds not open yet. Found on mid Madre Springs Trail. Seen very infrequently compared to erosa species.
Apocynaceae is a family of flowering plants that includes trees, shrubs, herbs, stem succulents, and vines, commonly called the dogbane family. Members of the family are native to European, Asian, African, Australian and American tropics or subtropics, with some temperate members.