Monumental Questions – What species of lupine can be found in the Berryessa Snow Mountain National Monument?

Many species of lupine make their home in Berryessa Snow Mountain National Monument
Lupines are very distinctive wildflowers – “digitate” leaves with a spire of colorful flowers. Digitate leaves are leaves that have finger-like lobes (look at your hand with your fingers spread wide). The flowers look like the flowers of a pea, which they are! Lupines are in the Fabaceae (pea) family. There are many other common plants around the Berryessa Snow Mountain National Monument region that are also in the pea family – deerweed (Acmispon glaber), Jepson’s milk-vetch (Astragalus rattanii var. jepsonianus), cowbag clover (Trifolium depauperatum), and California Redbud (Cercis occidentalis).
Knowing how many different species of lupine exist in the monument is very difficult but, Tuleyome Board member Dr. Glen Holstein, has been leading wildflower tours in Bear Valley, just east of the Monument, for many years. On these tours, Dr. Holstein has noted seven different lupines:
- Silver bush lupine (Lupinus albifrons)
- miniature lupine (Lupinus bicolor)
- small-flowered lupine (Lupinus micranthus)
- yellow lupine (Lupinus microcarpus var. densiflorus)
- valley lupine (Lupinus microcarpus var. microcarpus)
- sky lupine (Lupinus nanus)
- arroyo lupine (Lupinus succulentus)
These seven are what have been observed and identified during the wildflower tours. Calflora lists 42 different species of Lupines in the Berryessa Snow Mountain National Monument region!
In addition to the lupine, Dr Holstein has made note of all the plant species he has observed – wildflowers, trees, grasses, etc. Two of my favorite wildflowers that we have seen are the stream orchid (Epipactis gigantea) and the most beautiful jewelflower (Streptanthus glandulous ssp glandulosus) a black flower!
The wildflowers of Berryessa Snow Mountain National Monument are diverse and numerous. The many different ecosystems present in the Monument results in many different flowers. Lupines are beautiful flowers and different species bloom at various times through winter and summer. Throughout the Monument, from the banks of Cache Creek to the slope of Berryessa Peak to Snow Mountain Wilderness, Lupines add their color to the dazzling wildflower display. If you'd like to learn more about the wildflowers in the Berryessa Snow Mountain National Monument region, keep an eye on our events calendar for our upcoming spring wildflower tours!
Nate Lillge; nlillge@tuleyome.org
Adventures and Engagement Director
Certified California Naturalist
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