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PLANT of the MONTH   ~~   APRIL 2006
updated on or about the 1st of each month


Image of Bush Lupine

LUPINE

There are 82 species of Lupine (pronounced like "pin" not "pine") in California, with about 14 commonly found in the Santa Monica mountains. Blooming time ranges from February to July. Flower colors are white to various shades of blue and reddish-purple; it is often said the flower starts as white and once pollinated changes to the deeper hues. The leaves are palmately compound, and range from 5 to 9 leaflets. The number of leaflets on an individual plant can vary, as well as within and between varieties. Pods of varying size also form on the flower stems.

The name Lupinus means "wolf," referring to the untrue notion that this plant robs nutrients from the soil. In fact, Lupine is actually known to add nitrogen back to the soil; if you want to include it in your garden, plant seed in the fall in nutrient-poor soil.

The following chart gives some distinguishing characteristics of a few of the more common varieties native to our mountains. For a more comprehensive guide, you may wish to refer to a book such as Wildflowers of the Santa Monica Mountains by Milt McAuley.

Common name Species Size Bloom Time Other characteristics
Bush Lupine Lupinus longifolius Perennial shrub up to 5 feet tall Apr-Jun Leaves have 6-9 leaflets up to 2 inches long and silky. Flowers are bluish-purple. A mature plant in bloom is quite striking. Pictured above.
Nettle Lupine, Stinging Lupine Lupinus hirsutissimus Annual, 1 to 3 feet high Mar-May This species is very common on recently burned areas. Small, painfully stinging hairs cover leaves and flowers. Flowers are reddish-purple. Pictured below (Stagecoach Trail off the 118 freeway in Simi Valley, March 2006).
Dove Lupine Lupinus bicolor Annual, 4 to 16 inches high Mar-May Like Nettle Lupine, it is also commonly found in recently burned or otherwise disturbed areas. It too has small hairs but is not known for stinging.
Broad Leaved Lupine Lupinus latifolius Perennial, 2 to 4 feet high Apr-Jul Leaflets 1 1/2 to 4 inches long. Found in protected canyons.
Succulent Lupine, Arroyo Lupine, Foothill Lupine Lupinus succulentus Annual, 6 inches to 2 feet high Feb-May Leaflets up to 3 inches long, small non-stinging hairs. More common in clay soil. Thicker and fleshier than other lupines but not like true succulents.

Image of Nettle Lupine Image of Nettle Lupine


Contributed by Liz Baumann

Curious what was featured in past Plants of the Month? Search the Archives.

REFERENCES:
Wildflowers of the Santa Monica Mountains, by Milt McAuley
Flowering Plants: The Santa Monica Mountains, Coastal and Chaparral Regions of Southern California, by Nancy Dale
Roadside Plants of Southern California, by Thomas J. Belzer
California Native Plants for the Garden, by Carol Bornstein, David Fross, and Bart O'Brien