About Pleradenophora bilocularis (S.Watson) Esser & A.L.Melo
Pleradenophora bilocularis is a medium-sized flowering shrub. It has alternate, simple, smooth leaves, and flowers from March to November, producing greenish or green flowers. Its sap was historically used to poison arrowhead coatings, and was widely feared. This shrub also acts as a host plant for the large native silk moth Eupackardia calleta. It is most commonly found in upper bajadas, canyons, hills, and mountains. Its distribution includes Southwestern Arizona in the United States, Mexico south of the Guaymas region in Sonora, and both Baja California states.
