Taxon Report

Crataegus castlegarensis Phipps & R. O'Keenan

Castlegar hawthorne

Print Report

Taxon Summary

Crataegus castlegarensis, commonly known as Castlegar hawthorne, is a perennial deciduous shrub in the Rosaceae that is found in California and elsewhere. It occurs within Riparian woodland, growing at elevations from 0 to 1455 meters. Crataegus castlegarensis is ranked 3, Plants About Which We Need More Information, A Review List.

Classification


Scientific Name:	Crataegus castlegarensis Phipps & R. O'Keenan
Common Name:	Castlegar hawthorne
Family:	Rosaceae
Element Code:	PDROS0H9E0
USDA Plants Symbol:	CRCA30
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial deciduous shrub
Blooming Period: May-Jun(Jul)	May-Jun(Jul)
Elevation:	0-1455 (0-4775)
General Habitats:	Riparian woodland
Microhabitat:
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	3
Global Rank:	G5
State Rank:	S3?
State List:	None
Fed List:	None
Other Status:
CRPR Changes:	added to 3 on 2006-05-05

Occurrence Data from the CNDDB


Total Occurrences:	0
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	0
Fair (C)	0
Poor (D)	0
None (X)	0
Unknown (U)	0

Location


California Endemic: False
California Counties and Islands: Name (Code)
Modoc (MOD), Plumas (PLU), Shasta (SHA)
Quads: Name (Quad Code)
Adin (4112028), Burney (4012186), Burney Falls (4112116), Burney Mtn. East (4012175), Burney Mtn. West (4012176), Cassel (4012185), Crank Mountain (4112142), Crescent Mills (4012018), Dana (4112115), Devils Rock (4012271), Donica Mtn. (4112132), Egg Lake (4112133), Fall River Mills (4112114), Oak Run (4012261)

Threat List Data from the CNDDB


Threat List Total:	0
EOs with Threat Listed:	Total EOs	% of EOs
	0	0 %

Notes



How rare is this species in CA? Need information on current status, rarity and threats. Possibly threatened by logging, grazing, and recreational activities. Not in TJM (1993). See Sida 20:121 (2002) for original description and Madrono 51:395 (2004) for information on first report in California. Apparently widespread outside of CA where it is known from WA, OR, MT, ID, UT, WY, British Columbia and Alberta. Can be confused with C. douglasii and C. suksdorfii.
Threats:

Taxonomy:

Selected References

CRPR List Addition on 2006-05-05

USFS Potential Species of Conservation Concern Profile

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 27 January 2025].