Taxon Details

Betula glandulosa

dwarf resin birch

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Photo of Betula glandulosa
© 2015 Dean Wm. Taylor
Photo of Betula glandulosa
© 2020 Sierra Pacific Industries
Photo of Betula glandulosa
© 2015 Dean Wm. Taylor

Taxon Summary:

Betula glandulosa, commonly known as dwarf resin birch, is a perennial deciduous shrub in the Betulaceae that is found in California and elsewhere. It occurs within Bogs and fens, Lower montane coniferous forest, Marshes and swamps, Meadows and seeps, and Subalpine coniferous forest, growing at elevations from 1300 to 2300 meters. Betula glandulosa is ranked 2B.2, Plants Rare, Threatened, or Endangered in California, But More Common Elsewhere; Moderately threatened in California.

Lifeform: perennial deciduous shrub
Blooming Period: May-Jul
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Elevation:
1300 - 2300 meters
4265 - 7545 feet
General Habitats:
  • Bogs and fens
  • Lower montane coniferous forest
  • Meadows and seeps
  • Marshes and swamps
  • Subalpine coniferous forest
Microhabitat Details:
Microhabitat:
  • Mesic
Notes:
Possibly threatened by grazing, trampling, vehicles, and recreational activities. CA plants previously misapplied to Betula pumila var. glandulifera.
Threats:
Taxonomy:
Threat List Total: 6
Total EOs % of EOs
EOs with Threat Listed: 9 32 %
THREAT LIST:
Grazing 8 28%
Foot traffic/trampling 4 14%
Altered flood/tidal/hydrologic regime 2 7%
Dam/Inundation 1 3%
Recreational use (non-ORV) 1 3%
Total Occurrences: 28
Element Occurrence Ranks:
A B C D X U
0 4 4 3 1 16
Occurrence Status:
Historical >20 Years 17
Recent <=20 Years 11
Presence:
Presumed Extant 27
Possibly Extirpated 1
Presumed Extirpated 0
California Endemic:
California Island:
States: Name (Code)
Alaska (AK), California (CA), Colorado (CO), Idaho (ID), Maine (ME), Montana (MT), New Hampshire (NH), New York (NY), Oregon (OR), South Dakota (SD), Utah (UT), Washington (WA), Wyoming (WY)
California Counties and Islands: Name (Code)
Butte (BUT), Lassen (LAS), Modoc (MOD), Plumas (PLU), Siskiyou (SIS), Tehama (TEH)
Quads: Name (Quad Code)
Almanor (4012122), Antelope Mtn. (4012058), Bogard Buttes (4012152), Caribou (4012112), Chester (4012132), Childs Meadows (4012134), Davis Creek (4112063), Eagle Peak (4112032), Emerson Peak (4112022), Fort Bidwell (4112072), Humbug Valley (4012123), Jess Valley (4112023), Jonesville (4012114), Lake Annie (4112081), Mt. Bidwell (4112082), Panther Rock (4112272), Pegleg Mtn. (4012048), Warren Peak (4112042)
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.
Presumed Extant
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