Chamaesyce hooveri - Earth.com
chamaesyce hooveri
12-22-2016

Chamaesyce hooveri

Chamaesyce hooveri NatureServe Explorer Species Reports — NatureServe Explorer is a source for authoritative conservation information on more than 50,000 plants, animals and ecological communtities of the U.S and Canada. NatureServe Explorer provides in-depth information on rare and endangered species, but includes common plants and animals too. NatureServe Explorer is a product of NatureServe in collaboration with the Natural Heritage Network.

ITIS Reports — Chamaesyce hooveri ITIS (the Integrated Taxonomic Information System) is a source for authoritative taxonomic information on plants, animals, fungi, and microbes of North America and the world.

FWS Digital Media Library — The U.S. Fish and Wildlife Service’s National Digital Library is a searchable collection of selected images, historical artifacts, audio clips, publications, and video.

Euphorbia hooveri is a species of euphorb known by the common names Hoover’s sandmat and Hoover’s spurge. It is endemic to California, where it grows in the rare vernal pools of the Central Valley. Due to the elimination of most of its habitat, it became a federally listed threatened species in 1997.

This is an annual herb forming flat mats of thin, hairless stems. The stems are ringed with pairs of tiny, minutely toothed round leaves, each gray-green leaf blade only a few millimeters wide. The inflorescence is a cyathium only two millimeters wide. The cyathium is made up of flat, white appendages surrounding a single minute female flower within a cluster of several male flowers. The female flower develops into a spherical fruit containing white seed. The seeds germinate once the pool evaporates with the arrival of summer

Detailed information
Full Name: Hoover's spurge (Chamaesyce hooveri)
Where found: Wherever found
Critical Habitat:N/A
Species Group:Flowering Plants
Current listing status
Status Date Listed Lead Region Where Listed
Threatened 03/26/1997 California/Nevada Region (Region 8) Wherever found
  • States/US Territories in which the Hoover's spurge, Wherever found is known to or is believed to occur: California , Oregon
  • US Counties in which the Hoover's spurge, Wherever found is known to or is believed to occur: View All
  • USFWS Refuges in which the Hoover's spurge, Wherever found is known to occur: Sacramento National Wildlife Refuge
Federal register documents
Date
Citation Page
Title
04/01/2013 78 FR 19510 19514 Initiation of 5-Year Reviews of 56 Species in California and Nevada; request for information
05/21/2010 75 FR 28636 28642 Initiation of 5-Year Reviews of 34 Species in California and Nevada; Availability of 96 Completed 5-Year Reviews in California and Nevada
02/14/2007 72 FR 7064 7084 Initiation of 5-Year Reviews of 58 Species in California and Nevada; Availability of Completed 5-Year Reviews in California and Nevada
02/10/2006 71 FR 7118 7316 Final rule; administrative revisions - Designation of Critical Habitat for Four Vernal Pool Crustaceans and Eleven Vernal Pool Plants
08/11/2005 70 FR 46924 46999 Endangered and Threatened Wildlife and Plants; Final Designation of Critical Habitat for Four Vernal Pool Crustaceans and Eleven Vernal Pool Plants in California and Southern Oregon; Evaluation of Economic Exclusions From August 2003 Final Designation; Final Rule
11/18/2004 69 FR 67602 Draft Recovery Plan for Vernal Pool Ecosystems of California and Southern Oregon
08/06/2003 68 FR 46782 46832 Endangered and Threatened Wildlife and Plants; Final Designation of Critical Habitat for Four Vernal Pool Crustaceans and Eleven Vernal Pool Plants in California and Southern Oregon; (Part 3 of 4)
08/06/2003 68 FR 46733 46782 Endangered and Threatened Wildlife and Plants; Final Designation of Critical Habitat for Four Vernal Pool Crustaceans and Eleven Vernal Pool Plants in California and Southern Oregon; (Part 2 of 4)
08/06/2003 68 FR 46684 46732 Endangered and Threatened Wildlife and Plants; Final Designation of Critical Habitat for Four Vernal Pool Crustaceans and Eleven Vernal Pool Plants in California and Southern Oregon; (Part 1 of 4)
08/06/2003 68 FR 46833 46867 Endangered and Threatened Wildlife and Plants; Final Designation of Critical Habitat for Four Vernal Pool Crustaceans and Eleven Vernal Pool Plants in California and Southern Oregon; (Part 4 of 4)
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