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Pacific Yerba Santa
Eriodictyon traskiae

About Pacific Yerba Santa (Eriodictyon traskiae) Eriodictyon traskiae is a species of flowering plant in the waterleaf family known by the common names Pacific yerba santa and Trask's yerba santa. This shrub is endemic to California, where it grows on the chaparral slopes of the central Coast Ranges and Transverse Ranges. It approaches a maximum height of two meters. Its twigs and foliage are covered in a dense coat of white woolly hairs, giving the bush a gray-green look. The leaves are oval and anywhere from 3 to 14 centimeters long and 1 to 7 wide. They are woolly and crinkled and the edges roll under, and they may have small teeth. The bush flowers in dense fuzzy bunches of white to brownish-purple hairy blossoms, each under a centimeter wide. The fruit is a tiny capsule up to three millimeters wide containing two to four minute seeds.
Plant Description
Plant Type

Max. Height
3.5 - 7 ft (1.1 - 2.1 m)

Flower Color
White, Purple, Brown

Native Status

Natural Setting
Site Type


Elevation ?
-193' - 5376'

Annual Precip. ?
12.3" - 46.4"

Summer Precip. ?
0.13" - 0.78"

Coldest Month ?
40.7° F - 56.5° F

Hottest Month ?
59.5° F - 76.8° F

Humidity ?
0.82 vpd - 24.86 vpd

Sunset Zones ?
7, 8, 9, 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: Fire treatment gives some germination. Oven heat of 194°F for 5 mins. might improve germination.

Common uses
Hedges, Butterfly Gardens, Bee Gardens

Nursery Availability
Rarely Available

Other Names
Common Names
Trask's Yerba Santa

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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