CNPS.ORG Inventory of Rare and Endangered Plants - 7th edition interface
v7-18mar 3-19-18
Status: record rhamnus_alnifolia - Sun, Nov. 28, 2021 01:16 ET c
Rhamnus alnifolia
common namealder buckthorn
CalPhotos image
more photos
© 2000 Dean Wm. Taylor  Follow image link for photo data.
life form deciduous shrub
CA Rare Plant Rank
List 2B.2
LIST 2B: Rare, threatened, or endangered in California, but more common elsewhere.
     0.2: Fairly endangered in California
state rank
S3      ranking system key
global rank
G5     G5: demonstrably secure to ineradicable
CA state listingNone  
federal listingNone  
where found
MAPS - Use v8 link below.

Topographic quads (19):
Woodfords (522D) 3811977, Tahoe City (538B) 3912022, Hobart Mills (554B) 3912042, Truckee (554C) 3912032, Martis Peak (554D) 3912031, Independence Lake (555A) 3912043, Norden (555D) 3912033, Cisco Grove (556D) 3912035, Gold Lake (572B) 3912066, Mount Fillmore (573A) 3912067, Spring Garden (589A) 3912087, Bucks Lake (590B) 3912182, Soapstone Hill (591D) 3912173, Antelope Lake (604A) 4012025, Taylorsville (605D) 4012017, Canyondam (606A) 4012121, Caribou (606C) 4012112, Janesville (622D) 4012035, Westwood West (624D) 4012131
quad data info

Counties, states, regions:
Alpine (ALP), Lassen (LAS), Nevada (NEV), Placer (PLA), Plumas (PLU), Sierra (SIE), Idaho (ID), Oregon (OR), Utah (UT), Washington (WA), Wyoming (WY)
A reminder: Species not recorded for a given area may nonetheless be present, especially where favorable conditions occur.
CNPS habitats•Lower montane coniferous forest (LCFrs)
•Meadows and seeps (Medws)
•Riparian scrub (RpScr)
•Upper montane coniferous forest (UCFrs)
blooming period May-Jul  
elevation range1370 - 2130 meters
Known in California from fewer that 20 occurrences. Threatened by grazing. Possibly threatened by road maintenance.
full nameRhamnus alnifolia L'Her
Version 8    INVENTORY VERSION 8 interface for this taxon, including GIS and more links

Additional information:
standard acronym  RHAL Element Code  PDRHA0C010
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 Sun, Nov. 28, 2021 from

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