Lupinus antoninus
Encyclopedia
Lupinus antoninus is a rare species of lupin
Lupin
Lupinus, commonly known as Lupins or lupines , is a genus in the legume family . The genus comprises about 280 species , with major centers of diversity in South and western North America , and the Andes and secondary centers in the Mediterranean region and Africa Lupinus, commonly known as Lupins...

e known by the common name Anthony Peak lupine. It is endemic to northern California
California
California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...

, where it is known from only four occurrences in the North Coast Ranges, including near Anthony Peak
Anthony Peak (California)
Anthony Peak is a mountain located in the Northern Coast Ranges of California north of Mendocino Pass. The summit is the highest point in Mendocino County, and receives snowfall in the winter....

.

Description

Lupinus antoninus grows in mountain forests often amongst fir
Fir
Firs are a genus of 48–55 species of evergreen conifers in the family Pinaceae. They are found through much of North and Central America, Europe, Asia, and North Africa, occurring in mountains over most of the range...

s. 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
Inflorescence
An inflorescence is a group or cluster of flowers arranged on a stem that is composed of a main branch or a complicated arrangement of branches. Strictly, it is the part of the shoot of seed plants where flowers are formed and which is accordingly modified...

 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.

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