Taxon Report
Calyptridium pulchellum (Eastw.) Hoov.Mariposa pussypaws |
 © 2007 Chris Winchell |
Taxon Summary
Calyptridium pulchellum, commonly known as Mariposa pussypaws, is a annual herb in the Montiaceae that is found only in California. It occurs within Chaparral, and Cismontane woodland, growing at elevations from 400 to 1100 meters. Calyptridium pulchellum is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.Classification
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Scientific Name: |
Calyptridium pulchellum (Eastw.) Hoov. |
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Common Name: |
Mariposa pussypaws |
| Family: | Montiaceae |
| Element Code: | PDPOR09060 |
| USDA Plants Symbol: | |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | annual herb |
| Blooming Period: Apr-Aug | Apr-Aug |
| Elevation: | 400-1100 (1310-3610) |
| General Habitats: | Chaparral, Cismontane woodland |
| Microhabitat: | Granitic, Gravelly (sometimes), Sandy (sometimes) |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 1B.1 |
| Global Rank: | G1 |
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State Rank: |
S1 |
| State List: | None |
| Fed List: | FT |
| Other Status: | |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 9 |
| Element Occurrence Ranks: | |
| Excellent (A) | 1 |
| Good (B) | 3 |
| Fair (C) | 5 |
| Poor (D) | 0 |
| None (X) | 0 |
| Unknown (U) | 0 |
| California Endemic: True | |
| California Counties and Islands: Name (Code) | |
| Fresno (FRE), Madera (MAD), Mariposa (MPA) | |
| Quads: Name (Quad Code) | |
| Ahwahnee (3711936), Auberry (3711914), Cascadel Point (3711924), Mariposa (3711948), O'Neals (3711926) | |
Threat List Data from the CNDDB
| Threat List Total: | 11 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 9 | 100 % | |
| Non-native plant impacts | 5 | 55% |
| Road/trail construction/maint. | 4 | 44% |
| Grazing | 4 | 44% |
| Development | 2 | 22% |
| Other | 2 | 22% |
| Erosion/runoff | 1 | 11% |
| Foot traffic/trampling | 1 | 11% |
| Biocides | 1 | 11% |
| Vandalism/dumping/litter | 1 | 11% |
| Wood cutting or brush clearing | 1 | 11% |
| ORV activity | 1 | 11% |
Notes
| See Madroño 28(3):188 (1981) for distributional information. |
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Threats: |
| Threatened by development, grazing, non-native plants, and vehicles. |
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Taxonomy: |
| See Bulletin of the Torrey Botanical Club 29:79 (1902) for original description, Leaflets of Western Botany 2(13):222-225 (1940) for revised nomenclature, and Brittonia 27:197-208 (1975) for taxonomic treatment, |
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 November 2025].