Nevada Fish & Wildlife Office
Pacific Southwest Region

Webber's ivesia
(Ivesia webberi)

Photo Credit: Sarah Kulpa USFWS

Class: Magnoliopsida
Order: Rosales
Family: Rosaceae
Genus: Ivesia
Species: webberi
Habitat: Shallow shrink-swell clay soils with a gravelly surface layer over volcanic, generally andesitic bedrock, on mid-elevation benches and flats at elevations of 1360-1820 m
 

Official Status:

Proposed Listing as Threatened
 

Life History:

Webber’s ivesia is a member of the rose family.  Webber’s ivesia is a low-growing, perennial forb with clusters of leaves that lie nearly flat on the ground, and are approximately ten inches in diameter.  Webber’s ivesia has greenish-gray leaves, dark red, wiry stems, and headlike clusters of small bright yellow flowers.  Flowering typically begins in May and extends through June and the whole plant becomes reddish-tinged late in the season. 

 

Distribution and Habitat:

 

Webber’s ivesia is restricted to sites with sparse vegetation and shallow, rocky, clay soils on mid elevation flats, benches or terraces between 4,475 and 6,237 feet elevation in Washoe and Douglas Counties in Nevada, and in Lassen, Plumas and Sierra Counties, in California.  All 17 known populations of Webber’s ivesia are within the transition zone between the eastern edge of the northern Sierra Nevada and the northwestern edge of the Great Basin.  One of these populations is presumed extirpated.

 

Threats:

 

Threat to the species are urban development, authorized and unauthorized road use, OHVs and recreation use, livestock grazing and trampling, wildfire and suppression activities, displacement by nonnative, invasive plant species, and inadequacy of existing regulatory mechanisms.

 

Actions / Current Information:

 

 

Date Citation Title
     
02/12/2014   News Release: Draft Economic Analysis Available on Proposed Critical Habitat Rule for Webber’s Ivesia Public Comment Period Opens
02/13/2014   Federal Register Notice: Reopening of public comment period for Webber's ivesia proposed designation of critical habitat and availability of a draft economic analysis.
02/13/2017   Screening Analysis of the Likely Economic Impacts of Critical Habitat Designation for
the Ivesia webberi
02/13/2014   Supplemental Information on Land Values – Critical Habitat Designation for the Ivesia webberi
02/12/2014   FAQ's: Webber's ivesa proposed critical habitat and draft economic analysis frequently asked questions.
02/12/2014  
Revisions to proposed Webber's ivesia critical habitat.
Units 6 to 10
Units 12 to 13
Units 14 to 15
08/01/2013   News Release: Proposal to protect Webber’s ivesia (Ivesia webberi) as a threatened species under the Endangered Species Act (ESA) and to designate 2,011 acres of critical habitat for Webber’s ivesia in Washoe and Douglas Counties in Nevada, and in Lassen, Plumas, and Sierra Counties in California.
08/01/2013   Frequently Asked Questions - Proposed Listing and Proposed Critical Habitat for Webber’s Ivesia Not Warranted Determination for Soldier Meadow Cinquefoil.
08/01/2013   Federal Register Notice: Endangered and Threatened Wildlife and Plants; 12-Month Finding and Candidate Removal for Potentilla basaltica; Proposed Threatened Species Status for Ivesia webberi

08/01/2013

 

08/21/2013

 

Federal Register Notice:. Endangered and Threatened Wildlife and Plants; Proposed Designation of Critical Habitat for Ivesia webberi (Webber’s ivesia)

Please Note: Federal Register publication error-- the date of the public meeting will be September 10, 2013, from 4:00-6:00 pm. There will not be a public meeting on August 22, 2013. A date correction has been published in the Federal Register.

08/01/2013  
Webber ivesia units
Webber ivesia unit 1
Webber ivesia unit 2
Webber ivesia unit 5
Webber ivesia unit 11
         
Webber ivesia unit 16
Webber ivesia unit 3-4
Webber ivesia unit 6-10
Webber ivesia unit 12-13
Webber ivesia unit 14-15
11/09/2009 74 FR 57803 57878 Review of Native Species That Are Candidates for Listing as Endangered or Threatened; Annual Notice of Findings on Resubmitted Petitions; Annual Description of Progress on Listing Actions
12/10/2008 73 FR 75175 75244 Review of Native Species That Are Candidates for Listing as Endangered or Threatened; Annual Notice of Findings on Resubmitted Petitions; Annual Description of Progress on Listing Actions; Proposed Rule
12/06/2007 72 FR 69033 69106 Review of Native Species That Are Candidates for Listing as Endangered or Threatened; Annual Notice of Findings on Resubmitted Petitions; Annual Description of Progress on Listing Actions; Proposed Rule
09/12/2006 71 FR 53755 53835 Review of Native Species That Are Candidates or Proposed for Listing as Endangered or Threatened; Annual Notice of Findings on Resubmitted Petitions; Annual Description of Progress on Listing Actions
05/11/2005 70 FR 24869 24934
Endangered and Threatened Wildlife and Plants; Review of Native Species That Are Candidates or Proposed for Listing as Endangered or Threatened; Annual Notice of Findings on Resubmitted Petitions; Annual Description of Progress on Listing Actions; Proposed Rule
     
     
Last updated: April 16, 2014