Taxon Report
Arctostaphylos nipumu Abbo et al.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.Classification
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Scientific Name: |
Arctostaphylos nipumu Abbo et al. |
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Common Name: |
Nipomo Mesa manzanita |
| Family: | Ericaceae |
| Element Code: | |
| USDA Plants Symbol: | |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | perennial evergreen shrub |
| Blooming Period: Jan-Mar(Apr-Dec) | Jan-Mar(Apr-Dec) |
| Elevation: | 18-155 (60-510) |
| General Habitats: | Chaparral |
| Microhabitat: | Sandy |
| Microhabitat Details: | Pleistocene stabilized sand dune deposits. |
Conservation Status
| CA Rare Plant Rank: | 1B.1 |
| Global Rank: | |
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State Rank: |
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| State List: | None |
| Fed List: | None |
| Other Status: | |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 0 |
| Element Occurrence Ranks: | |
| Excellent (A) | 0 |
| Good (B) | 0 |
| Fair (C) | 0 |
| Poor (D) | 0 |
| None (X) | 0 |
| Unknown (U) | 0 |
| California Endemic: True | |
| California Counties and Islands: Name (Code) | |
| Quads: Name (Quad Code) | |
Threat List Data from the CNDDB
| Threat List Total: | 0 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 0 | 0 % | |
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. |
Selected References
| Phytokeys 251: 119–142 (2025) |
Citation
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 6 May 2025].