Taxon Report
Sidalcea hickmanii Greene ssp. pillsburiensis S.R. HillLake Pillsbury checkerbloom |
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Taxon Summary
Sidalcea hickmanii ssp. pillsburiensis, commonly known as Lake Pillsbury checkerbloom, is a perennial herb in the Malvaceae that is found only in California. It occurs within Chaparral, growing at elevations from 700 to 700 meters. Sidalcea hickmanii ssp. pillsburiensis is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.Classification
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Scientific Name: |
Sidalcea hickmanii Greene ssp. pillsburiensis S.R. Hill |
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Common Name: |
Lake Pillsbury checkerbloom |
| Family: | Malvaceae |
| Element Code: | PDMAL110A5 |
| USDA Plants Symbol: | |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | perennial herb |
| Blooming Period: Jul-Aug | Jul-Aug |
| Elevation: | 700-700 (2295-2295) |
| General Habitats: | Chaparral |
| Microhabitat: | Openings |
| Microhabitat Details: | Franciscan soils |
Conservation Status
| CA Rare Plant Rank: | 1B.2 |
| Global Rank: | G2T1 |
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State Rank: |
S1 |
| State List: | None |
| Fed List: | None |
| Other Status: | USFS_S |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 1 |
| Element Occurrence Ranks: | |
| Excellent (A) | 0 |
| Good (B) | 0 |
| Fair (C) | 1 |
| Poor (D) | 0 |
| None (X) | 0 |
| Unknown (U) | 0 |
| California Endemic: True | |
| California Counties and Islands: Name (Code) | |
| Lake (LAK) | |
| Quads: Name (Quad Code) | |
| Lake Pillsbury (3912248) | |
Threat List Data from the CNDDB
| Threat List Total: | 1 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 1 | 100 % | |
| Other | 1 | 100% |
Selected References
| Sidalcea hickmanii ssp. pillsburiensis profile for potential Species of Conservation Concern evaluation (2018) |
Citation
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 31 October 2025].