Taxon Report
Sidalcea malviflora (DC.) Benth. ssp. patula C.L. Hitchc.Siskiyou checkerbloom |
 ©2004 Dean Wm. Taylor |
Taxon Summary
Sidalcea malviflora ssp. patula, commonly known as Siskiyou checkerbloom, is a perennial rhizomatous herb in the Malvaceae that is found in California and elsewhere. It occurs within Coastal bluff scrub, Coastal prairie, and North Coast coniferous forest, growing at elevations from 15 to 1230 meters. Sidalcea malviflora ssp. patula 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 malviflora (DC.) Benth. ssp. patula C.L. Hitchc. |
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Common Name: |
Siskiyou checkerbloom |
| Family: | Malvaceae |
| Element Code: | PDMAL110F9 |
| USDA Plants Symbol: | SIMAP |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | perennial rhizomatous herb |
| Blooming Period: (Mar-Apr)May-Aug | (Mar-Apr)May-Aug |
| Elevation: | 15-1230 (50-4035) |
| General Habitats: | Coastal bluff scrub, Coastal prairie, North Coast coniferous forest |
| Microhabitat: | Roadsides (often) |
| Microhabitat Details: | often roadcuts |
Conservation Status
| CA Rare Plant Rank: | 1B.2 |
| Global Rank: | G4G5T2 |
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State Rank: |
S2 |
| State List: | None |
| Fed List: | None |
| Other Status: | BLM_S; SB_UCSC |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 60 |
| Element Occurrence Ranks: | |
| Excellent (A) | 10 |
| Good (B) | 22 |
| Fair (C) | 11 |
| Poor (D) | 1 |
| None (X) | 0 |
| Unknown (U) | 16 |
| California Endemic: False | |
| California Counties and Islands: Name (Code) | |
| Del Norte (DNT), Humboldt (HUM), Mendocino (MEN) | |
| Quads: Name (Quad Code) | |
| Albion (3912327), Arcata North (4012481), Bald Hills (4112328), Board Camp Mtn. (4012366), Bridgeville (4012347), Buckeye Mtn. (4012432), Capetown (4012443), Crescent City (4112472), Denny (4012384), Eureka (4012472)(?), Ferndale (4012453), Fields Landing (4012462), Fortuna (4012452), Garberville (4012317), Grouse Mtn. (4012376), Hydesville (4012451), Iaqua Buttes (4012368), Korbel (4012378), Lord-ellis Summit (4012387), Mad River Buttes (4012367), Maple Creek (4012377), Myers Flat (4012337), Orick (4112431), Owl Creek (4012358), Petrolia (4012433), Salyer (4012385), Scotia (4012441), Shubrick Peak (4012422), Smith River (4112482), Taylor Peak (4012442), Yager Junction (4012357) | |
Threat List Data from the CNDDB
| Threat List Total: | 11 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 41 | 68 % | |
| Road/trail construction/maint. | 20 | 33% |
| Grazing | 18 | 30% |
| Logging | 17 | 28% |
| Non-native plant impacts | 9 | 15% |
| Other | 6 | 10% |
| Agriculture | 5 | 8% |
| Development | 5 | 8% |
| Foot traffic/trampling | 4 | 6% |
| Biocides | 2 | 3% |
| Vandalism/dumping/litter | 2 | 3% |
| ORV activity | 1 | 1% |
Selected References
| USFS Potential Species of Conservation Concern Profile |
Citation
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 27 January 2025].