Taxon Report
Chaenactis carphoclinia Gray var. peirsonii (Jeps.) MunzPeirson's pincushion |
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Taxon Summary
Chaenactis carphoclinia var. peirsonii, commonly known as Peirson's pincushion, is a annual herb in the Asteraceae that is found only in California. It occurs within Sonoran desert scrub, growing at elevations from 3 to 500 meters. Chaenactis carphoclinia var. peirsonii is ranked 1B.3, Plants Rare, Threatened or Endangered in California and Elsewhere; Not very threatened in California.Classification
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Scientific Name: |
Chaenactis carphoclinia Gray var. peirsonii (Jeps.) Munz |
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Common Name: |
Peirson's pincushion |
| Family: | Asteraceae |
| Element Code: | PDAST20042 |
| USDA Plants Symbol: | CHCAP2 |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | annual herb |
| Blooming Period: Mar-Apr | Mar-Apr |
| Elevation: | 3-500 (10-1640) |
| General Habitats: | Sonoran desert scrub |
| Microhabitat: | |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 1B.3 |
| Global Rank: | G5T2 |
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State Rank: |
S2 |
| State List: | None |
| Fed List: | None |
| Other Status: | BLM_S; SB_CalBG/RSABG |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 12 |
| Element Occurrence Ranks: | |
| Excellent (A) | 0 |
| Good (B) | 3 |
| Fair (C) | 0 |
| Poor (D) | 0 |
| None (X) | 0 |
| Unknown (U) | 9 |
| California Endemic: True | |
| California Counties and Islands: Name (Code) | |
| Imperial (IMP), San Diego (SDG) | |
| Quads: Name (Quad Code) | |
| Borrego Mountain (3311622), Borrego Mountain SE (3311611), Borrego Palm Canyon (3311634), Borrego Sink (3311623), Clark Lake (3311633), Seventeen Palms (3311631), Shell Reef (3311621), Tubb Canyon (3311624) | |
Threat List Data from the CNDDB
| Threat List Total: | 1 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 4 | 33 % | |
| ORV activity | 4 | 33% |
Notes
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Known only from the eastern Santa Rosa Mtns, where known from few collections. Possibly threatened by vehicles. Does plant occur in RIV Co.? See Madroño |
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Threats: |
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Taxonomy: |
Citation
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 7 November 2025].