Taxon Details
Arctostaphylos nipumu
Nipomo Mesa manzanita
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Taxon Summary:
Arctostaphylos nipumu, commonly known as Nipomo Mesa manzanita, is a perennial evergreen shrub in the Ericaceae that is found only in California. It occurs within Chaparral (maritime, and sandy), growing at elevations from 18 to 155 meters. Arctostaphylos nipumu is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.|
Scientific Name: Arctostaphylos nipumu Abbo et al. |
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Common Name: Nipomo Mesa manzanita |
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| Family: | Ericaceae | |
| Element Code: | PDERI043D0 | |
| USDA Plants Symbol: | ||
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Synonyms/Other Names: |
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| Name Status: |
JEF, FNA, POWO, IPNI, Tropicos |
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| CA Rare Plant Rank: | 1B.1 |
| Fed List: | None |
| State List: | None |
| Global Rank: | G1 |
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State Rank: |
S1 |
| Other Status: | |
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CRPR Changes: |
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| Add Date: | 2025-03-20 |
| Date Edited: | 2025-05-06 |
| Lifeform: perennial evergreen shrub | ||||||||||||||
Blooming Period: Jan-Mar(Apr-Dec)
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Elevation:
18 - 155 meters 60 - 510 feet |
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General Habitats:
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| Microhabitat Details: Pleistocene stabilized sand dune deposits. | ||||||||||||||
Microhabitat:
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Notes: |
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Threats: Population and habitat severely reduced on Nipomo Mesa, and remaining occurrences seriously threatened by development. Possibly threatened by agriculture, development, disking, improper burning regime, mowing, nonnative plants, road and trail construction or maintenance, and wood cutting or brush clearing. Improperly sourced restoration plantings are a potential threat to the genetic integrity of A. nipumu. |
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Taxonomy: Formerly included within A. rudis, which is now only known to occur naturally in SBA Co. Differentiated by bark differences and lack of a basal burl. See key provided in the original description for additional information. |
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| Threat List Total: | 7 | |
| Total EOs | % of EOs | |
| EOs with Threat Listed: | 9 | 75 % |
| THREAT LIST: | ||
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| Development | 8 | 66% |
| Road/trail construction/maint. | 3 | 25% |
| Wood cutting or brush clearing | 3 | 25% |
| Agriculture | 2 | 16% |
| Disking | 1 | 8% |
| Improper burning regime | 1 | 8% |
| Non-native plant impacts | 1 | 8% |
| Total Occurrences: | 12 | ||||
| Element Occurrence Ranks: | |||||
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| A | B | C | D | X | U |
| 0 | 1 | 3 | 3 | 0 | 5 |
| Occurrence Status: | |||||
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| Historical >20 Years | 6 | ||||
| Recent <=20 Years | 6 | ||||
| Presence: | |||||
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| Presumed Extant | 12 | ||||
| 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) |
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Quads: Name (Quad Code) Arroyo Grande NE (3512025), Nipomo (3512014), Oceano (3512015), Pismo Beach (3512026) |
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Notes:
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Presumed Extant
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