CNPS

CNPS Rare Plant Inventory



Taxon Details

Arctostaphylos cruzensis

Arroyo de la Cruz manzanita

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Photo of Arctostaphylos cruzensis
© 2006 Steve Matson 		Photo of Arctostaphylos cruzensis
© 2020 Zoya Akulova 		Photo of Arctostaphylos cruzensis
© 2002 David Graber

Taxon Summary:

Arctostaphylos cruzensis, commonly known as Arroyo de la Cruz manzanita, is a perennial evergreen shrub in the Ericaceae that is found only in California. It occurs within Broadleafed upland forest, Chaparral, Closed-cone coniferous forest, Coastal bluff scrub, Coastal scrub, and Valley and foothill grassland, growing at elevations from 60 to 310 meters. Arctostaphylos cruzensis is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

  Classification

Scientific Name:
Arctostaphylos cruzensis Roof
Common Name:
Arroyo de la Cruz manzanita
Family: Ericaceae
Element Code: PDERI040B0
USDA Plants Symbol: ARCR6
Synonyms/Other Names:
Name Status: JEF, FNA, POWO,
IPNI, Tropicos

  Conservation Status

CA Rare Plant Rank: 1B.2
Fed List: None
State List: None
Global Rank: G1G2
State Rank:
 S1S2
Other Status: BLM_S; SB_SBBG; USFS_S
CRPR Changes:
Add Date: 1974-01-01
Date Edited: 2022-02-01

  Ecology and Life History

Lifeform: perennial evergreen shrub
Blooming Period: Dec-Mar
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Elevation:
60 - 310 meters
195 - 1015 feet
General Habitats:
  • Broadleafed upland forest
  • Coastal bluff scrub
  • Closed-cone coniferous forest
  • Chaparral
  • Coastal scrub
  • Valley and foothill grassland
Microhabitat Details:
Microhabitat:
  • Sandy

  Notes

Notes:
Possibly threatened by development and grazing. Potentially threatened by frequent wildfires and fire suppression activities. See Leaflets of Western Botany 9:218 (1962) for original description.
Threats:
Taxonomy:

  Threat List Data from the CNDDB

Threat List Total: 4
Total EOs % of EOs
EOs with Threat Listed: 3 38 %
THREAT LIST:
Grazing 2 25%
Other 1 12%
Wood cutting or brush clearing 1 12%
Foot traffic/trampling 1 12%

  Occurrence Data from the CNDDB

Total Occurrences: 8
Element Occurrence Ranks:
A B C D X U
2 0 2 0 0 4
Occurrence Status:
Historical >20 Years 4
Recent <=20 Years 4
Presence:
Presumed Extant 8
Possibly Extirpated 0
Presumed Extirpated 0

  Location

California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
Monterey (MNT), San Luis Obispo (SLO)
Quads: Name (Quad Code)
Cambria (3512151), Cape San Martin (3512184), Piedras Blancas (3512163)
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
Click on quad for name. Hold Shift Key to use mouse scroll wheel

  Selected References

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Suggested Citation:
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 3 February 2025].
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