Apocynum androsaemifolium (Spreading Dogbane) [Home] | [Books] | [Links] | [Message Board] Click photo to enlarge More Photos: Habitat: Dry hillsides in foothill areas around the ponderosa belt. Edibility: Poisonous Description: Tough fibers were used for making a strong thread, cords, and rope. Dogbane should never be used internally.