Lupinus luteolus
Encyclopedia
Lupinus luteolus is a 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 names pale yellow lupine and butter lupine. It is native to the coastal mountain ranges of Oregon
Oregon
Oregon is a state in the Pacific Northwest region of the United States. It is located on the Pacific coast, with Washington to the north, California to the south, Nevada on the southeast and Idaho to the east. The Columbia and Snake rivers delineate much of Oregon's northern and eastern...

 and 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...

 as far south as the Transverse Ranges
Transverse Ranges
The Transverse Ranges are a group of mountain ranges of southern California, in the Pacific Coast Ranges physiographic region that runs along the Pacific coast from Alaska to Mexico in North America. The Transverse Ranges begin at the southern end of the California Coast Ranges and lie between...

, where it grows in open habitat such as clearings and sometimes disturbed areas. It is an annual herb with a rigid stem growing to maximum heights anywhere between 30 centimeters and 1.5 meters, and known to exceed that at times. Each palmate leaf is made up of 7 to 9 hairy leaflets 1 to 3 centimeters long. 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 a raceme
Raceme
A raceme is a type of inflorescence that is unbranched and indeterminate and bears pedicellate flowers — flowers having short floral stalks called pedicels — along the axis. In botany, axis means a shoot, in this case one bearing the flowers. In a raceme, the oldest flowers are borne...

 of crowded whorls of flowers each just over a centimeter long. The flower is often pale to bright yellow, but can be blue or pinkish. The fruit is a hairy, rounded or oval legume pod generally containing 2 seeds.

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