Species Details

Arctostaphylos glandulosa ssp. crassifolia

Del Mar manzanita

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Photo of Arctostaphylos glandulosa ssp. crassifolia
© 2012 Neal Kramer
Photo of Arctostaphylos glandulosa ssp. crassifolia
© 2013 Keir Morse
Photo of Arctostaphylos glandulosa ssp. crassifolia
© 2016 Barbara Boethling
Scientific Name:
Arctostaphylos glandulosa Eastw. ssp. crassifolia (Jeps.) Wells
Common Name:
Del Mar manzanita
Family: Ericaceae
Element Code: PDERI040E8
USDA Plants Symbol: ARGLC4
Synonyms/Other Names:
Lifeform: perennial evergreen shrub
Blooming Period: Jun-Apr
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Elevation:
0 - 365 meters
0 - 1200 feet
General Habitats:
  • Chaparral (maritime, sandy)
Microhabitat Details:
Microhabitat:
Notes:
Threatened by urbanization, agricultural conversion, and fuel modification. CA populations have declined greatly. Reported to intergrade with ssp. zacaensis. See Madroño 1(4):86 (1922) for original description, Madroño 19:205 (1968) for revised nomenclature, and Four Seasons 7(4):5-27 (1987) for taxonomic treatment.
Threats:
Taxonomy:
Threat List Total: 16
Total EOs % of EOs
EOs with Threat Listed: 38 67 %
THREAT LIST:
Development 28 49%
Improper burning regime 22 38%
Non-native plant impacts 9 15%
Road/trail construction/maint. 7 12%
Recreational use (non-ORV) 6 10%
Total Occurrences: 57
Element Occurrence Ranks:
A B C D X U
2 13 3 4 2 33
Occurrence Status:
Historical >20 Years 27
Recent <=20 Years 30
Presence:
Presumed Extant 55
Possibly Extirpated 2
Presumed Extirpated 0
California Endemic:
California Island:
States: Name (Code)
Baja California (BA), California (CA)
California Counties and Islands: Name (Code)
San Diego (SDG)
Quads: Name (Quad Code)
Del Mar (3211782), Encinitas (3311713), La Mesa (3211771), Poway (3211781), Rancho Santa Fe (3311712), San Luis Rey (3311723), San Marcos (3311722)
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.
Presumed Extant
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