Lupinus antoninus is a rare species of lupine known by the common name Anthony Peak lupine. It is endemic to northern California,[1] where it is known from only four occurrences in the North Coast Ranges, including near Anthony Peak.[2]
Lupinus antoninus grows in mountain forests often amongst firs. This is a hairy, erect perennial herb growing 20- tall. Each palmate leaf is made up of 6 or 7 leaflets each 1.5- long. The herbage is coated in gray or silvery hairs. The inflorescence is up to long, bearing many flowers each just over a centimeter long. The flower is whitish with a light brownish wash on its banner. The fruit is a silky-haired legume pod up to long containing a few mottled brown seeds.