CNPS

CNPS Rare Plant Inventory

Species Details

Arctostaphylos hispidula

Howell's manzanita

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Photo of Arctostaphylos hispidula
© 2006 Steve Matson 		Photo of Arctostaphylos hispidula
© 2002 Djibo Zanzot 		Photo of Arctostaphylos hispidula
© 2006 Steve Matson

  Classification

Scientific Name:
Arctostaphylos hispidula Howell
Common Name:
Howell's manzanita
Family: Ericaceae
Element Code: PDERI04230
USDA Plants Symbol: ARHI5
Synonyms/Other Names:

  Conservation Status

CA Rare Plant Rank: 4.2
Fed List: None
State List: None
Global Rank: G4
State Rank:
 S3
Other Status: SB_UCSC
CRPR Changes:
Add Date: 1974-01-01
Date Edited: 2022-12-06

  Ecology and Life History

Lifeform: perennial evergreen shrub
Blooming Period: Mar-Apr
JFMAMJJASOND
Elevation:
120 - 1250 meters
395 - 4100 feet
General Habitats:
  • Chaparral (sandstone, serpentinite)
Microhabitat Details:
Microhabitat:

  Notes

Notes:
Threatened by mining. Possibly threatened by vehicles. Endangered in OR. See A Flora of Northwest America, p. 415 (1903) by T.J. Howell for original description.
Threats:
Taxonomy:

  Threat List Data from the CNDDB

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

  Occurrence Data from the CNDDB

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

  Location

California Endemic:
California Island:
States: Name (Code)
California (CA), Oregon (OR)
California Counties and Islands: Name (Code)
Del Norte (DNT), Humboldt (HUM), Siskiyou (SIS), Sonoma (SON)
Quads: Name (Quad Code)
Big Foot Mtn. (3812372), Black Lassic (4012335), Camp Meeker (3812248), Cant Hook Mtn. (4112368), Childs Hill (4112461), Devils Punchbowl (4112376), Dinsmore (4012345), Gasquet (4112378), Guerneville (3812258), High Divide (4112481), High Plateau Mtn. (4112388), Hiouchi (4112471), Klamath Glen (4112358), Ship Mountain (4112367)
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

Suggested Citation:
California Native Plant Society, Rare Plant Program. 2024. Rare Plant Inventory (online edition, v9.5). Website https://www.rareplants.cnps.org [accessed 19 November 2024].