Species Details

Dimeresia howellii

doublet

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Photo of Dimeresia howellii
©2016 Richard Spellenberg
Photo of Dimeresia howellii
©2006 Steve Matson
CA Rare Plant Rank: 2B.3
Fed List: None
State List: None
Global Rank: G4?
State Rank:
S3
Other Status:
CRPR Changes:
changed from 2.3 to 2B.3 on 2013-06-12
Add Date: 1974-01-01
Date Edited: 2021-12-09
Lifeform: annual herb
Blooming Period: May-Sep
Elevation:
1340 - 2380 meters
4395 - 7810 feet
General Habitat:
  • Lower montane coniferous forest
  • Pinyon and juniper woodland
General Micro Habitat: xeric
Micro Habitat:
  • Volcanic
Notes:
Possibly threatened by foot traffic and grazing. Threatened in ID. See Synoptical Flora of North America ed. 2, 1(2):449 (1886) for original description, and Fremontia 16(1):15-17 (1988) for brief species account and BLM management plans.
Threats:
Taxonomy:
Other:
Total Occurrences: 50
Element Occurrence Ranks:
A B C D X U
9 18 1 0 0 22
Occurrence Status:
Historical >20 Years 38
Recent <=20 Years 12
Presence:
Presumed Extant 50
Possibly Extirpated 0
Presumed Extirpated 0
California Endemic:
California Island:
States: Name (Code)
California (CA), Idaho (ID), Nevada (NV), Oregon (OR)
California Counties and Islands: Name (Code)
Lassen (LAS), Modoc (MOD), Siskiyou (SIS)
Quads: Name (Quad Code)
Alturas (4112045), Ash Valley (4112016), Bonita Butte (4112166), Caldwell Butte (4112164), Cedarville (4112052), Eagle Peak (4112032), Emerson Peak (4112022), Infernal Caverns (4112035), Lake Annie (4112081), Lake City (4112062), Lane Reservoir (4112017), Larkspur Hills (4112071), Letterbox Hill (4112018), Mahogany Ridge (4112055), Mt. Bidwell (4112082), Payne Peak (4112053), Rattlesnake Butte (4112046), Sheepshead (4012077), Warren Peak (4112042), Willow Ranch (4112083)
Notes:
Definitions of codes following a county and/or quad:
* Presumed extirpated
(?) Occurrence confirmed, but possibly extirpated
Quad and county data is imported from the CNDDB. Species may be present in other areas where conditions are favorable. These data should NOT be substituted for pre-project review or for on-site surveys.

Map

Presumed Extant
Counties   Quads