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Pt. Reyes Sidalcea
Sidalcea calycosa
  
4 Nurseries Carry This Plant

About Pt. Reyes Sidalcea (Sidalcea calycosa) 4 Nurseries Carry This Plant Sidalcea calycosa is a native annual herb in the Malvaceae (Mallow) family that grows in central and northern California from the coast to the central valley and Sierra foothills. It tends to grow in marshes, vernal pools and other wet places, at elevations from sea level to 3,900 feet. There are two recognized subspecies. Ssp. rhizomata (Pt. Reyes Checkerbloom) is a rare plant found only along the coast in Marin, Sonoma and Mendocino counties. Sidalcea calycosa is most often seen as an annual, but if conditions are right it may become a weak perennial growing from a rhizome. In the garden it needs a very wet area and not too much competition. If conditions are good it will spread.
Plant Description
Plant Type
Plant Type
Annual Herb

Size
Size
1 - 3 ft tall

Form
Form
Spreading

Growth Rate
Growth Rate
Fast

Dormancy
Dormancy
Summer Semi-Deciduous

Flower Color
Flower Color
Pink

Flowering Season
Flowering Season
Spring, Summer, Fall

Wildlife Supported
 
Important pollinator plant which attracts native bees and butterflies, including the West Coast Lady butterfly (Vanessa annabella).

 
Butterflies & moths hosted ( 6 likely * ) SHOW ALL
*
Strymon melinus Image
Gray Hairstreak Strymon melinusStrymon melinus
*
Pyrgus communis Image
Common Checkered-Skipper Pyrgus communisPyrgus communis
*
Pyrgus ruralis Image
Two-banded Checkered-Skipper Pyrgus ruralisPyrgus ruralis
*
Vanessa annabella Image
West Coast Lady Vanessa annabellaVanessa annabella
*
Pyrgus albescens Image
White Checkered-Skipper Pyrgus albescensPyrgus albescens
*
Hyles lineata Image
White-lined Sphinx Hyles lineataHyles lineata

Landscaping Information
Sun
Sun
Part Shade, Full Sun

Moisture
Moisture
Moderate - High

Summer Irrigation
Summer Irrigation
Keep moist

Nurseries
Nurseries
Carried by 4

Ease of Care
Ease of Care
Very Easy

Cold Tolerance
Cold Tolerance
Tolerates cold to 20° F

Soil Drainage
Soil Drainage
Fast, Medium, Slow, Standing

Soil Description
Soil Description
Tolerant of a variety of garden soils as long as sufficient moisture is available

Common uses
Common uses
Groundcovers, Bird Gardens, Butterfly Gardens

Companion Plants
Companion Plants
Other wet-loving plants that won't be covered by this spreading plant. Consider Ferns (Polystichum munitum, Adiantum capillus-veneris), riparian trees (Alnus rubra), or rushes (Cyperus eragrostis).

Maintenance
Maintenance
Can be affected by rusts, slugs, and snails.. Cut back at the end of autumn once flowering has completed to encourage more blooming.

Propagation
Propagation?
Propagate by dividing by the rhizomes. Divide plants in the spring (cooler areas) or the autumn in (warmer areas).

Natural Setting
Site Type
Site Type
Coastal marshes and wet places, including vernal pools.

Climate
Climate
Annual Precipitation: 12.6" - 66.0", Summer Precipitation: 0.18" - 1.25", Coldest Month: 43.8" - 51.9", Hottest Month: 58.9" - 77.6", Humidity: 0.09" - 25.16", Elevation: 13" - 3890"

Alternative Names
Common Names: Annual Checkerbloom


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Sources include: Wikipedia. All text shown in the "About" section of these pages is available under the Creative Commons Attribution-ShareAlike License. Plant observation data provided by the participants of the California Consortia of Herbaria, Sunset information provided by Jepson Flora Project. Propogation from seed information provided by the Santa Barbara Botanical Garden from "Seed Propagation of Native California Plants" by Dara E. Emery. Sources of plant photos include CalPhotos, Wikimedia Commons, and independent plant photographers who have agreed to share their images with Calscape. Other general sources of information include Calflora, CNPS Manual of Vegetation Online, Jepson Flora Project, Las Pilitas, Theodore Payne, Tree of Life, The Xerces Society, and information provided by CNPS volunteer editors, with special thanks to Don Rideout. Climate data used in creation of plant range maps is from PRISM Climate Group, Oregon State University, using 30 year (1981-2010) annual "normals" at an 800 meter spatial resolution.

Links:   Jepson eFlora Taxon Page  CalPhotos  Wikipedia  Calflora


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