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Delphinium decorum
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Coastal Larkspur
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Delphinium decorum

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About Coastal Larkspur (Delphinium decorum) Delphinium decorum is a species of larkspur known by the common names coastal larkspur and yellowtinge larkspur. This wildflower is endemic to California, where it grows on the slopes of the coastal ranges in the San Francisco Bay Area and north. It grows an erect stem which approaches half a meter in height at maximum. The leaves, which are divided into a number of narrow lobes, are mostly located about the base of the plant. The spindly stem above bears two to twenty widely spaced flowers. Each flower is carried on a pedicel several centimeters long. The five long, flat sepals are extended to give the face of the flower a star shape, and they are usually deep blue to purple. The petals are similar in color, except the top two may be lighter to almost white. The spur is very thin and may be nearly two centimeters long.
Plant Description
Plant Type
Perennial herb

Max. Height
1.6 ft (0.49 m)

Flower Color
Blue, White, Purple

Native Status

Natural Setting
Sun, Part Shade

Elevation ?
10' - 8177'

Annual Precip. ?
11.6" - 133.8"

Summer Precip. ?
0.22" - 4.60"

Coldest Month ?
30.0° F - 51.5° F

Hottest Month ?
51.6° F - 75.7° F

Humidity ?
0.43 vpd - 23.90 vpd

Landscaping Information
Common uses
Hummingbird Gardens, Bee Gardens

Nursery Availability
Never or Almost Never Available

Other Names
Common Names
Yellowtinge 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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