Taxon Details

Holodiscus discolor var. cedrorum

Cedars oceanspray

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Photo of Holodiscus discolor var. cedrorum

Taxon Summary:

Holodiscus discolor var. cedrorum, commonly known as Cedars oceanspray, is a perennial deciduous shrub in the Rosaceae that is found only in California. It occurs within Chaparral (sometimes), and Closed-cone coniferous forest, growing at elevations from 170 to 540 meters. Holodiscus discolor var. cedrorum is ranked 1B.3, Plants Rare, Threatened or Endangered in California and Elsewhere; Not very threatened in California.

Classification

Scientific Name: Holodiscus discolor (Pursh) Maxim. var. cedrorum (Raiche & Reveal) D. Potter & Raiche
Common Name: Cedars oceanspray
Family:	Rosaceae
Element Code:	PDROS0V041
USDA Plants Symbol:
Synonyms/Other Names:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	1B.3
Fed List:	None
State List:	None
Global Rank:	G5T1
State Rank:	S1
Other Status:	BLM_S
CRPR Changes: added to 1B.3 on 2024-04-11
Add Date:	2024-04-11
Date Edited:	2025-10-29

Ecology and Life History

Lifeform: perennial deciduous shrub

Blooming Period: (Apr)May-Jun(Jul)

Elevation:
170 - 540 meters
560 - 1770 feet

General Habitats:

Closed-cone coniferous forest
Chaparral (sometimes)

Microhabitat Details: Usually on peridotite. Locally common on lower canyon slopes in relatively mesic, old-growth Hesperocyparis sargentii woodland where it may be encountered even in dense shade. Sometimes found in chaparral, predominantly on north-facing slopes.

Microhabitat:

Serpentine

Notes

Notes:
Threats: Possibly threatened by road construction, mining, and brush clearing.
Taxonomy: Differentiated from other varieties by its growth on serpentine and leaves that are glabrous, adaxially shiny, flushed red, and with wedge-shaped bases.

Threat List Data from the CNDDB

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

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					9
A	B	C	D	X	U
0	0	0	0	0	9

Occurrence Status:
Historical >20 Years	2
Recent <=20 Years	7

Presence:
Presumed Extant	9
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
Sonoma (SON)

Quads: Name (Quad Code)
Cazadero (3812351), Fort Ross (3812352), Tombs Creek (3812362)

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.

Regional Map

Map

Presumed Extant

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CNPS Status Review:	Proposed addition to CRPR 1B.3, G1T1 / S1 (2024)
Original Description:	Journal of the Botanical Research Institute of Texas 5(1): 25–32 (2011)
Revised Nomenclature:	Phytotaxa 477(2): 284–290 (2020)

CNPS Rare Plant Inventory