| Lupinus antoninus | |
|---|---|
| Conservation status | |
|
Critically Imperiled (NatureServe) |
|
| Scientific classification | |
| Kingdom: | Plantae |
| (unranked): | Angiosperms |
| (unranked): | Eudicots |
| (unranked): | Rosids |
| Order: | Fabales |
| Family: | Fabaceae |
| Subfamily: | Faboideae |
| Tribe: | Genisteae |
| Genus: | Lupinus |
| Species: | L. antoninus |
| Binomial name | |
| Lupinus antoninus Eastw. |
|
Lupinus antoninus is a rare species of lupine known by the common name Anthony Peak lupine. It is endemic to northern California, where it is known from only four occurrences in the North Coast Ranges, including near Anthony Peak.
Lupinus antoninus grows in mountain forests often amongst firs. This is a hairy, erect perennial herb growing 20 to 50 centimeters tall. Each palmate leaf is made up of 6 or 7 leaflets each 1.5 to 2.5 centimeters long. The herbage is coated in gray or silvery hairs. The inflorescence is up to 20 centimeters 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 3.5 centimeters long containing a few mottled brown seeds.