Taxon Report

Betula glandulosa Michx.

dwarf resin birch

Print Report


© 2015 Dean Wm. Taylor

  Classification
Scientific Name:
 Betula glandulosa Michx.
Common Name:
 dwarf resin birch
Family: Betulaceae
Element Code: PDBET02040
USDA Plants Symbol: BEGL
Synonyms/Other Names:

Ecology and Life History
Lifeform: perennial deciduous shrub
Blooming Period: May-Jul May-Jul
Elevation: 1300-2300 (4265-7545)
General Habitats: Bogs and fens, Lower montane coniferous forest, Marshes and swamps, Meadows and seeps, Subalpine coniferous forest
Microhabitat: Mesic
Microhabitat Details:

Conservation Status
CA Rare Plant Rank: 2B.2
Global Rank: G5
State Rank:
 S2
State List: None
Fed List: None
Other Status: IUCN_LC
CRPR Changes:
  • changed from 2.2 to 2B.2 on 2013-06-12

Occurrence Data from the CNDDB
Total Occurrences: 28
Element Occurrence Ranks:
   Excellent (A) 0
   Good (B) 4
   Fair (C) 4
   Poor (D) 3
   None (X) 1
   Unknown (U) 16

Location
California Endemic:  False
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)

Threat List Data from the CNDDB

Threat List Total: 6
EOs with Threat Listed: Total EOs % of EOs
9 32 %
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%
Surface water diversion 1 3%

Notes
Possibly threatened by grazing, trampling, vehicles, and recreational activities. CA plants previously misapplied to Betula pumila var. glandulifera.
Threats:
Taxonomy:

Selected References

Betula glandulosa account for potential Species of Conservation Concern evaluation (2022)
Citation California Native Plant Society, Rare Plant Program. 2024. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 28 December 2024].