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BC Conservation Data Centre: Species Summary

Sidalcea hendersonii
Henderson's checker-mallow

Scientific Name: Sidalcea hendersonii S. Wats.
English Name: Henderson's checker-mallow
Classification / Taxonomy
Scientific Name - Concept Reference: Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
Classification Level: Species
Species Group: Vascular Plant
Species Code: SIDAHEN
Kingdom Phylum Class Order Family
Plantae Anthophyta Dicotyledoneae Malvales Malvaceae
Conservation Status / Legal Designation
Global Status: G3 (Jun 2016)
Provincial Status: S3 (Apr 2021)
BC List: Blue
Provincial FRPA list:   
Provincial Wildlife Act:
SARA Schedule:
General Status Canada: 3 - Sensitive (2010)
Ecology & Life History
General Description:
Technical Description:
Similar Species:
(Type / Subtype / Dependence)
Other Unique Habitats / Estuary / Unknown
Wetland / Marsh / Unknown
Global Habitat Comments: Sidalcea hendersonii grows in coastal wet areas, mudflats and high marshes.
Provincial Phenology:
(1st half of month/
2nd half of month)
Elevation (m) (min / max): Provincial: 
Known Pests:
Pollen Vector:
Provincial Inventory
Inventory Priority:
Ownership of occurrences (Known locations):
Inventory Need:
Economic Attributes
Endemic: N
Global Range Comment: This species is found along the coast from Douglas County, Oregon northward to Vancouver Island, British Columbia. Only a few populations are reported from Oregon and British Columbia. The bulk of the populations are centered along the Washington coastline, including the inner Puget Sound region. Two individuals were recently discovered in southeastern Alaska (Lipkin, personal communication).
Disjunct, more common elsewhere:
Peripheral, major distribution elsewhere:
Authors / Contributors
Global Information Author:
Last Updated:
Provincial Information Author:
Last Updated:
Last Literature Search:
References and Related Literature
Douglas, G.W., D. Meidinger, and J. Penny. 2002. Rare Native Vascular Plants of British Columbia, 2nd ed. B.C. Conserv. Data Centre, Terrestrial Inf. Branch, Victoria. 358pp.
Douglas, G.W., D. Meidinger, and J. Pojar. eds. 1999. Illustrated Flora of British Columbia, Vol. 3, Dicotyledons (Diapensiaceae through Onagraceae). B.C. Minist. Environ., Lands and Parks, and B.C. Minist. For., Victoria. 423pp.

Please visit the website Conservation Status Ranks for definitions of the data fields used in this summary report.

Suggested Citation:

B.C. Conservation Data Centre. Species Summary: Sidalcea hendersonii. B.C. Minist. of Environment. Available: (accessed May 28, 2024).