Commicarpus scandens  Climbing Wartclub
PERENNIAL.  A shrubby, woody vine with opposite heart-shaped leaves (often rimmed with pink or purple), terminal clusters of tiny white flowers (.5 cm), and club-shaped seeds (1 cm) adorned with tiny knobs.  No thorns or tendrils.  Not usually visible before late summer but may bloom in spring after a wet winter.  Highly variable depending on the locality.  When growing among rocks on dry slopes, it is a small, trailing, inconspicuous plant.  In shady washes after heavy summer rain, it forms an impenetrable leafy tangle.  Common throughout the Empires.  Formerly called Boerhavia scandens.
FAMILY:  Nyctaginaceae (Four O'Clock Family)