Species Details
Arctostaphylos rudis
sand mesa manzanita
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Species Description:
Arctostaphylos rudis, commonly known as sand mesa manzanita, is a perennial evergreen shrub in the Ericaceae that is found only in California. It occurs within Chaparral (maritime), and Coastal scrub, growing at elevations from 25 to 322 meters. Arctostaphylos rudis is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.|
Scientific Name: Arctostaphylos rudis Jeps. & Wies. |
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Common Name: sand mesa manzanita |
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| Family: | Ericaceae | |
| Element Code: | PDERI041E0 | |
| USDA Plants Symbol: | ARRU2 | |
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Synonyms/Other Names: |
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| Name Status: |
JEP, FNA, POWO, IPNI, Tropicos |
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| CA Rare Plant Rank: | 1B.1 |
| Fed List: | None |
| State List: | None |
| Global Rank: | G2 |
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State Rank: |
S2 |
| Other Status: | BLM_S; SB_SBBG |
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CRPR Changes: |
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| Add Date: | 1980-01-01 |
| Date Edited: | 2024-11-05 |
| Lifeform: perennial evergreen shrub | ||||||||||||||
Blooming Period: Nov-Feb
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Elevation:
25 - 322 meters 80 - 1055 feet |
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General Habitats:
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| Microhabitat Details: | ||||||||||||||
Microhabitat:
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Notes: Plants on Nipomo Mesa (SLO Co.) have been determined to be a novel species, with A. rudis becoming restricted to SBA Co. See Erythea 8:100 (1938) for original description. |
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Threats: Threatened by development, agriculture, oil extraction, and road construction and maintenance. Severely reduced on Nipomo Mesa, where potentially seriously threatened by housing development. |
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Taxonomy: |
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| Threat List Total: | 10 | |
| Total EOs | % of EOs | |
| EOs with Threat Listed: | 19 | 53 % |
| THREAT LIST: | ||
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| Development | 15 | 41% |
| Non-native plant impacts | 5 | 13% |
| Road/trail construction/maint. | 5 | 13% |
| Wood cutting or brush clearing | 4 | 11% |
| Other | 3 | 8% |
| Improper burning regime | 3 | 8% |
| Agriculture | 2 | 5% |
| Disking | 1 | 2% |
| Grazing | 1 | 2% |
| Vandalism/dumping/litter | 1 | 2% |
| Total Occurrences: | 36 | ||||
| Element Occurrence Ranks: | |||||
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| A | B | C | D | X | U |
| 4 | 7 | 4 | 4 | 0 | 17 |
| Occurrence Status: | |||||
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| Historical >20 Years | 24 | ||||
| Recent <=20 Years | 12 | ||||
| Presence: | |||||
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| Presumed Extant | 36 | ||||
| Possibly Extirpated | 0 | ||||
| Presumed Extirpated | 0 | ||||
| California Endemic: | |||||||||||||
| California Island: | |||||||||||||
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States: Name (Code) California (CA) |
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California Counties and Islands: Name (Code) San Luis Obispo (SLO), Santa Barbara (SBA) |
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Quads: Name (Quad Code) Arroyo Grande NE (3512025), Casmalia (3412075), Guadalupe (3412085), Lompoc (3412064), Lompoc Hills (3412054), Los Alamos (3412063), Nipomo (3512014), Oceano (3512015), Orcutt (3412074), Pismo Beach (3512026), Point Arguello (3412056), Point Sal (3412086), Sisquoc (3412073), Surf (3412065), Tranquillon Mtn. (3412055) |
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Notes:
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Presumed Extant
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