CNPS.ORG Inventory of Rare and Endangered Plants - 7th edition interface
v7-18mar 3-19-18
Status: record ivesia_webberi - Wed, Dec. 8, 2021, 10:46 ET b
Ivesia webberi
common nameWebber's ivesia
CalPhotos image
more photos
Carol Witham © 1998 CNPS  Follow image link for photo data.
life formperennial herb
CA Rare Plant Rank
List 1B.1
LIST 1B: Rare, threatened, or endangered in California and elsewhere.
     0.1: Seriously endangered in California
state rank
S1      ranking system key
global rank
G1     G1: Less than 6 occurrences OR less than 1,000 individuals OR less than 2,000 acres.
Where did the "RED" code go?
CA state listingNone  
federal listingThreatened  
where found
MAPS - Use v8 link below.

Topographic quads (7):
Evans Canyon (570A) 3912061, Loyalton (570B)* 3912062, Dog Valley (570D) 3912051, Constantia (586A) 3912081, Chilcoot (586C) 3912072, Quincy (589B)* 3912088, Crescent Mills (605C)* 4012018
quad data info

Counties, states, regions:
Lassen (LAS), Plumas (PLU), Sierra (SIE), Nevada (NV)
A reminder: Species not recorded for a given area may nonetheless be present, especially where favorable conditions occur.
CNPS habitats•Great Basin scrub (GBScr)(volcanic ash)
•Lower montane coniferous forest (LCFrs)
•Pinyon and juniper woodland (PJWld)/sandy or gravelly
blooming period May-Jul  
elevation range1000 - 2075 meters
Known in CA only from Sierra and Dog valleys. Threatened by vehicles, and potentially by development, grazing, alteration of fire regimes, and non-native plants. Threatened in NV. See Proceedings of the American Academy of Arts and Sciences 10:71 (1874) for original description.
full nameIvesia webberi Gray
Version 8    INVENTORY VERSION 8 interface for this taxon, including GIS and more links

Additional information:
standard acronym  IVWE Element Code  PDROS0X0Q0
CalFlora species this taxon    CalFlora genus related taxa
Jepson Online Jepson Interchange  Jepson Manual and other resources
Google search
search Google CNPS website    search Google entire web

Suggested citation: California Native Plant Society (CNPS). 2018. Inventory of Rare and Endangered Plants (online edition, v7-18mar). California Native Plant Society. Sacramento, CA. Accessed on Wed, Dec. 8, 2021 from

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