Species Details

Rhamnus alnifolia

alder buckthorn

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Scientific Name:
Rhamnus alnifolia L'Her
Common Name:
alder buckthorn
Family: Rhamnaceae
Element Code: PDRHA0C010
USDA Plants Symbol: RHAL
Synonyms/Other Names:
CA Rare Plant Rank: 2B.2
Fed List: None
State List: None
Global Rank: G5
State Rank:
S3
Other Status:
CRPR Changes:
changed from 2.2 to 2B.2 on 2013-06-12
added to 2.2 on 2008-03-26
Add Date: 2008-03-26
Date Edited: 2021-05-26
Lifeform: perennial deciduous shrub
Blooming Period: May-Jul
Elevation:
1370 - 2130 meters
4495 - 6990 feet
General Habitat:
  • Lower montane coniferous forest
  • Meadows and seeps
  • Riparian scrub
  • Upper montane coniferous forest
General Micro Habitat:
Micro Habitat:
Notes:
Known in California from fewer that 20 occurrences. Threatened by grazing. Possibly threatened by road maintenance.
Threats:
Taxonomy:
Other:
Total Occurrences: 27
Element Occurrence Ranks:
A B C D X U
3 4 0 0 1 19
Occurrence Status:
Historical >20 Years 15
Recent <=20 Years 12
Presence:
Presumed Extant 26
Possibly Extirpated 1
Presumed Extirpated 0
California Endemic:
California Island:
States: Name (Code)
California (CA), Idaho (ID), Oregon (OR), Utah (UT), Washington (WA), Wyoming (WY)
California Counties and Islands: Name (Code)
Butte (BUT), Lassen (LAS), Nevada (NEV), Placer (PLA), Plumas (PLU), Sierra (SIE)
Quads: Name (Quad Code)
Antelope Lake (4012025), Antelope Mtn. (4012058), Bucks Lake (3912182), Canyondam (4012121), Caribou (4012112), Cisco Grove (3912035), Crocker Mtn. (3912084), Gold Lake (3912066), Hobart Mills (3912042), Independence Lake (3912043), Janesville (4012035), Martis Peak (3912031), Mt. Fillmore (3912067), Norden (3912033), Pegleg Mtn. (4012048), Soapstone Hill (3912173), Soda Springs (3912034), Spring Garden (3912087), Tahoe City (3912022), Taylorsville (4012017), Truckee (3912032), Westwood West (4012131)
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