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Western Larkspur
Delphinium hesperium

About Western Larkspur (Delphinium hesperium) Delphinium hesperium is a species of larkspur known by the common name foothill larkspur. It is also sometimes called western larkspur and coastal larkspur, but these names are less specific since other species share them. It is endemic to California, where it grows in woodland and grassland in the northern half of the state. This wildflower generally reaches one half to one meter in height. It has deeply lobed, prominently veined leaves, mostly located near the base of the plant. The flower cluster may hold very few to over 100 flowers, each on a long, thick pedicel. The flowers are usually a brilliant blue or purple, and sometimes lighter pinkish to white. Often the sepals are dark in color and the petals lighter. The spur is about one to two centimeters long
Plant Description
Plant Type
Perennial herb

Max. Height
1.6 - 3.3 ft (0.49 - 1 m)

Flower Color
Blue, Pink, White, Purple

Native Status

Natural Setting
Site Type
Open, grassy places

Sun, Part Shade

Elevation ?
13' - 8781'

Annual Precip. ?
7.5" - 84.6"

Summer Precip. ?
0.20" - 2.09"

Coldest Month ?
35.4° F - 54.6° F

Hottest Month ?
54.8° F - 83.0° F

Humidity ?
0.09 vpd - 33.80 vpd

Landscaping Information
Common uses
Hummingbird Gardens, Bee Gardens

Nursery Availability
Never or Almost Never Available

Other Names
Common Names
Foothill Larkspur

Sources include: Wikipedia. All text shown in the "About" section of these pages is available under the Creative Commons Attribution-ShareAlike License. Plant observation data provided by the participants of the California Consortia of Herbaria, Sunset information provided by Jepson Flora Project. Propogation from seed information provided by the Santa Barbara Botanical Garden from "Seed Propagation of Native California Plants" by Dara E. Emery. Sources of plant photos include CalPhotos, Wikimedia Commons, and independent plant photographers who have agreed to share their images with Calscape. Other general sources of information include Calflora, CNPS Manual of Vegetation Online, Jepson Flora Project, Las Pilitas, Theodore Payne, Tree of Life, The Xerces Society, and information provided by CNPS volunteer editors, with special thanks to Don Rideout. Climate data used in creation of plant range maps is from PRISM Climate Group, Oregon State University, using 30 year (1981-2010) annual "normals" at an 800 meter spatial resolution.

Links:   Jepson eFlora Taxon Page  CalPhotos  Wikipedia  Calflora

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