Taxon Report
Sidalcea malachroides (H. & A.) Graymaple-leaved checkerbloom |
 ©2005 Dean Wm. Taylor |
Classification
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Scientific Name: |
Sidalcea malachroides (H. & A.) Gray |
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Common Name: |
maple-leaved checkerbloom |
| Family: | Malvaceae |
| Element Code: | PDMAL110E0 |
| USDA Plants Symbol: | SIMA |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | perennial herb |
| Blooming Period: (Mar)Apr-Aug | (Mar)Apr-Aug |
| Elevation: | 0-730 (0-2395) |
| General Habitats: | Broadleafed upland forest, Coastal prairie, Coastal scrub, North Coast coniferous forest, Riparian woodland |
| Microhabitat: | Disturbed areas (often) |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 4.2 |
| Global Rank: | G3 |
|
State Rank: |
S3 |
| 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: | 136 |
| Element Occurrence Ranks: | |
| Excellent (A) | 4 |
| Good (B) | 15 |
| Fair (C) | 41 |
| Poor (D) | 43 |
| None (X) | 2 |
| Unknown (U) | 31 |
| California Endemic: False | |
| California Counties and Islands: Name (Code) | |
| Del Norte (DNT), Humboldt (HUM), Mendocino (MEN), Monterey (MNT), Santa Clara (SCL), Santa Cruz (SCR), Sonoma (SON) | |
| Quads: Name (Quad Code) | |
| Ah Pah Ridge (4112348), Albion (3912327), Arcata North (4012481), Arcata South (4012471), Bear Harbor (3912388), Big Sur (3612137), Blue Lake (4012388), Bridgeville (4012347), Calaveras Reservoir (3712147), Cape Mendocino (4012444), Childs Hill (4112461), Cold Spring (3912315), Comptche (3912335), Crescent City (4112472), Dutchmans Knoll (3912356), Elk (3912326), Eureka (4012472), Eureka Hill (3812385), Fern Canyon (4112441), Ferndale (4012453), Fields Landing (4012462), Fort Bragg (3912347), Gualala (3812375), Hales Grove (3912377), High Divide (4112481), Hydesville (4012451), Iaqua Buttes (4012368), Inglenook (3912357), Korbel (4012378), Laurel (3712118), Lord-ellis Summit (4012387), Mallo Pass Creek (3912316), Maple Creek (4012377), Mathison Peak (3912336), McWhinney Creek (4012461), Mendocino (3912337), Monterey (3612158), Mt. Carmel (3612147), Myers Flat (4012337), Navarro (3912325), Noyo Hill (3912346), Owl Creek (4012358), Partington Ridge (3612126), Petrolia (4012433), Point Arena (3812386), Point Sur (3612138), Redcrest (4012348), Requa (4112451), Santa Cruz (3612281), Scotia (4012441), Shubrick Peak (4012422), Sister Rocks (4112462), Soberanes Point (3612148), Soquel (3612188), Stewarts Point (3812364), Taylor Peak (4012442), Weott (4012338), Westport (3912367) | |
Threat List Data from the CNDDB
| Threat List Total: | 13 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 109 | 80 % | |
| Logging | 93 | 68% |
| Road/trail construction/maint. | 83 | 61% |
| Non-native plant impacts | 15 | 11% |
| Other | 12 | 8% |
| Biocides | 8 | 5% |
| ORV activity | 4 | 2% |
| Grazing | 3 | 2% |
| Foot traffic/trampling | 2 | 1% |
| Altered flood/tidal/hydrologic regime | 1 | 0% |
| Development | 1 | 0% |
| Improper burning regime | 1 | 0% |
| Mining | 1 | 0% |
| Recreational use (non-ORV) | 1 | 0% |
Notes
| SCL Co. (427A) occurrence based on old specimen, needs confirmation. Threatened by logging and associated road usage, non-native plants, competition, low reproduction, road maintenance, and development. Endangered in OR. See University of Washington Publications in Biology 18:1-96 (1957) for taxonomic treatment. |
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Threats: |
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Taxonomy: |
Selected References
| CRPR List Addition on 2003-04-04 |
| CRPR List Change on 2006-06-01 |
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 January 2025].