Photo from University of Arizona.
This slightly skinny member of the
Convolvulaceae family was
given this name by Robert Sweet in 1830. It is found in Sonora
region of Mexico, growing in a well
drained soil with some water and lots of sun. The fast growing
stem can reach 25 centimetres in diameter and six or even tem metres
in height. The large flowers are white.
It is grown as a crop in El
Salvador, Guatemala, Senegal and Zimbabwe.
The species name
arborescens means tree-like.