''Lupinus peirsonii'' is a rare species of
lupine known by the common names Peirson's lupine and long lupine. It is
endemic
Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found else ...
to the
San Gabriel Mountains of
Los Angeles County, California, where it grows in woodland and forest habitat. It is an erect, branching perennial herb growing 30 to 60 centimeters tall. Each palmate leaf is made up of 5 to 8 fleshy leaflets up to 7 centimeters long. The herbage is coated in silvery silky hairs. The
inflorescence
An inflorescence is a group or cluster of flowers arranged on a Plant stem, stem that is composed of a main branch or a complicated arrangement of branches. Morphology (biology), Morphologically, it is the modified part of the shoot of sperma ...
is a
raceme of whorled yellow flowers each about a centimeter in length. The fruit is a silky-haired
legume pod 3 or 4 centimeters long.
External links
Jepson Manual TreatmentPhoto gallery
peirsonii
Endemic flora of California
Natural history of the California chaparral and woodlands
Natural history of Los Angeles County, California
Natural history of the Transverse Ranges
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Flora without expected TNC conservation status
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