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Antirrhinum coulterianum
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Coulter Snapdragon
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Antirrhinum coulterianum

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About Coulter Snapdragon (Antirrhinum coulterianum) Antirrhinum coulterianum (syn. Sairocarpus coulterianus) is a species of New World snapdragon known by the common name Coulter's snapdragon. It is native to southern California and Baja California, where it grows in desert shrublands and in the coastal hills and mountains, especially in areas that have recently burned. This is an annual herb producing an erect stem which often clings to objects or other plants for support. It is mostly hairless, except for the flower cluster at the top, which can be quite woolly. Leaves are sparse and generally linear and there is often a basal rosette of leaves at the base of the stem; this is the only Antirrhinum that forms such a rosette. The top of the mostly naked stem is occupied by a raceme flower cluster of white snapdragon flowers, which are often tinted with lavender or pink, especially when newly opened. Each flower is about a centimeter wide.
Plant Description
Plant Type
Annual herb

Max. Height
0.39 - 4.9 ft (0.12 - 1.5 m)

Flower Color

Flowering Season

Native Status

Natural Setting
Site Type
Desert, burned places

Sun, Part Shade, Full Shade

Elevation ?
7' - 7455'

Annual Precip. ?
4.6" - 47.1"

Summer Precip. ?
0.15" - 3.08"

Coldest Month ?
30.5° F - 58.8° F

Hottest Month ?
59.9° F - 87.5° F

Humidity ?
0.79 vpd - 38.43 vpd

Sunset Zones ?
7*, 8, 9, 10, 11, 12, 14*, 15, 16, 17, 18*, 19*, 20*, 21*, 22*, 23*, 24*

Landscaping Information
Ease of Care
Moderately Easy

Water Requirement ?
Very Low
Extremely Low
Very Low
Moderate - High

Propagation ?
For propagating by seed: No treatment. gives some germination. Addition of a small amount of charate over the sown seeds greatly improves germination ( Keeley and Keeley 1982).

Common uses
Hummingbird Gardens, Bee Gardens

Nursery Availability
Rarely Available

Other Names
Common Names
Coulter's Snapdragon

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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