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

Loading....
Hoover's Eriastrum
  • Added Add to My Plant List
Eriastrum hooveri
  

Zoom To My AddressZoom To California Estimated Plant Range




About Hoover's Eriastrum (Eriastrum hooveri) Eriastrum hooveri is a rare species of flowering plant in the phlox family known by the common name Hoover's woollystar. It is endemic to the South Coast Ranges of California from San Benito to Los Angeles Counties, where it grows in grassy open habitat. It is an annual herb producing a wiry, usually woolly stem up to about 15 centimeters tall. The leaves are linear and threadlike, less than three centimeters long, and sometimes divided into two thready lobes. The inflorescence is a woolly cluster of narrow, leaflike bracts laced with webby fibers. The flowers are white and just a few millimeters in length. This plant was considered to be in serious jeopardy in the 1980s when many of its populations, most of which occurred on private and unprotected land, were in immediate danger of being destroyed by one or more threats, including conversion of the land for agricultural use, petroleum drilling, development for housing, grazing, agricultural pollution, invasive plants, flooding, and fire suppression. The plant was federally listed as a threatened species in 1990. After the listing, further studies revealed many more populations, including several in counties where it was not previously known. The species may have been sparse during the 1980s surveys due to drought conditions. The plant was also found to be more adaptable and resilient to destruction than previously thought. Several companies that own land where the plant occurs, such as that in the Lost Hills Oil Field, have put protection measures in place. Based on these events, which demonstrated the plant was not as threatened as was feared, it was delisted in 2003. It is still designated a sensitive species by the Bureau of Land Management.
Plant Description
Plant Type
Annual herb

Max. Height
1.2 - 5.9 in (3 - 15 cm)

Flower Color
White

Native Status
Natural Setting
Elevation ?
119' - 3232'

Annual Precip. ?
5.7" - 36.6"

Summer Precip. ?
0.14" - 0.77"

Coldest Month ?
41.2° F - 52.2° F

Hottest Month ?
69.2° F - 78.7° F

Humidity ?
1.32 vpd - 29.90 vpd

Landscaping Information
Nursery Availability
Never or Almost Never Available

Other Names
Common Names
Hoover's Woollystar


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
Password

Sign In


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