California Native Plant Society
Tap map to see plants native to location
Eriastrum sapphirinum
Please enter either the common name or the botanical name of any native California plant species to see it's plant record

Sapphire Woollystar
  • Added Add to My Plant List
Eriastrum sapphirinum

Zoom To My AddressZoom To California Estimated Plant Range

About Sapphire Woollystar (Eriastrum sapphirinum) Eriastrum sapphirinum is a species of flowering plant in the phlox family known by the common name sapphire woollystar. This wildflower is endemic to California where it is found in many habitats throughout the state. It is an annual reaching anywhere from 5 to 40 centimeters in height, forming clumps or singular spindly stems. The stem is erect and may be reddish to green, and has the occasional threadlike leaf with sparse hairs to a coat of dense wool. The flower clusters at the tips of the stems are packed with pointed, leaflike green to red leafs and funnel-shaped flowers. The corolla of the flower has five lobes each one half to one centimeter long and pale to bright blue. The throat of the flower is the same color or yellowish to white. At the mouth of the tube there may be dots of yellow and white. The light colored stamens protrude.
Plant Description
Plant Type
Annual herb

Max. Height
0.16 - 1.3 ft (0.05 - 0.4 m)

Flower Color

Native Status

Natural Setting
Site Type
Dry places


Elevation ?
180' - 8704'

Annual Precip. ?
3.4" - 41.3"

Summer Precip. ?
0.20" - 3.00"

Coldest Month ?
31.6° F - 59.7° F

Hottest Month ?
57.1° F - 88.2° F

Humidity ?
1.04 vpd - 39.21 vpd

Landscaping Information
Nursery Availability
Rarely Available


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

Sign in to your Calscape Account X

Once signed in, you'll be able to access any previously saved plant lists or create new ones.

Email Address

Sign In

Copyright © 1999-2014 California Native Plant Society. All rights reserved.