Lupinus Lepidus var. Lobbii on Mt. St. Helens.
Two year old lupine. Stem is sheathed in lupine aphids.
Whole patches can be driven extinct by the root-borer. Here about 1000 plants were killed simultaneously.
Willow (Salix spp.) and alder (Alnus sinuata) attacked by stem-boring weevil larva (Cryptorhynchus latvia).
Weevil larva often kill whole plants.