Lupinus latifolius var. thompsonianus Lupinus violaceus Lupinus sulphureus subsp. delnortensis Lupinus thompsonianus Lupinus violaceus var. delnortensis Lupinus oreganus var. pusillulus Lupinus violaceus var. shastensis Lupinus pinetorum
World Flora Online, http://www.worldfloraonline.org/, accessed June 20, 2024