Nutt. ex Hook. & Arn.
Lupinus truncatus is a species of lupine known by the common name collared annual lupine.
It is native to the coastal mountain ranges and canyons of Baja California and California as far north as the San Francisco Bay Area. It grows in slope habitat such as chaparral and woodland, including areas that have recently burned.
Lupinus truncatus is an annual herb growing no more than 0.5 metres (1.6 ft) tall. Each palmate leaf is made up of 5 to 8 narrow linear leaflets measuring 2 to 4 centimeters in length and just a few millimeters wide. The leaflets usually have truncate tips, or tips that appear sharply cut off and squared, the characteristic that gives the plant its species name.
The fruit is a hairy legume pod about 3 centimeters long and half a centimeter wide.
- Jepson Manual Treatment: Lupinus truncatus
- USDA Plants Profile
- Lupinus truncatus — U.C. Photo gallery
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