Taxon Details
Arctostaphylos glandulosa ssp. crassifolia
Del Mar manzanita
View Report Copy Link Calflora eFlora CCH CalPhotos iNaturalist
© 2012 Neal Kramer |
© 2013 Keir Morse |
© 2016 Barbara Boethling |
Taxon Summary:
Arctostaphylos glandulosa ssp. crassifolia, commonly known as Del Mar manzanita, is a perennial evergreen shrub in the Ericaceae that is found in California and elsewhere. It occurs within Chaparral (maritime, and sandy), growing at elevations from 0 to 365 meters. Arctostaphylos glandulosa ssp. crassifolia is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.|
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: |
||
| Name Status: |
JEF, FNA, POWO, IPNI, Tropicos |
|
| CA Rare Plant Rank: | 1B.1 |
| Fed List: | FE (1996-10-07) |
| State List: | None |
| Global Rank: | G5T2 |
|
State Rank: |
S2 |
| Other Status: | SB_CRES |
|
CRPR Changes: |
|
| Add Date: | 1974-01-01 |
| Date Edited: | 2022-12-06 |
| Lifeform: perennial evergreen shrub | ||||||||||||||
Blooming Period: Jun-Apr
|
||||||||||||||
|
Elevation:
0 - 365 meters 0 - 1200 feet |
||||||||||||||
General Habitats:
|
||||||||||||||
| 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% |
| Other | 5 | 8% |
| Insufficient population/stand size | 5 | 8% |
| Hybridization | 5 | 8% |
| Foot traffic/trampling | 5 | 8% |
| Vandalism/dumping/litter | 4 | 7% |
| Wood cutting or brush clearing | 1 | 1% |
| ORV activity | 1 | 1% |
| Grazing | 1 | 1% |
| Erosion/runoff | 1 | 1% |
| Agriculture | 1 | 1% |
| Military operations | 1 | 1% |
| 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:
|
|||||||||||||
Presumed Extant
Click on quad for name. Hold Shift Key to use mouse scroll wheel