aggregate-fruit berries color colors colour colours common cultivars diverse drupelets edible etaerio European-raspberry food frersh fruit genus-rubus hairy healthy idaeobatus juicy nutritional nutritious perennial pistils raspberries raw red red-raspberry Rosaceae rose-family rubus-idaeus soft superspecies surface surfaces sweet tender texture textured textures tiny-hairs varieties variety carnivorous catch danger digests Dionaea muscipula Flytrap green insect plant trap Venus