 It is of notable pollinator and nesting material value for native bee and bumble bee species.This blackberry species is a larval food source for the western tiger swallowtail butterfly ("Papilio rutulus"), the mourning cloak butterfly ("Nymphalis antiopa"), the gray hairstreak butterfly ("Strymon melinus"), and the spring azure butterfly ("Celastrina ladon").Native Americans, such as the Kumeyaay, Maidu, Pomo and Salish peoples, used "Rubus ursinus" as a fresh and dried fruit source and as a traditional medicinal plant.