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Sorrel
Oxalis oregana
  
About Sorrel (Oxalis oregana) 17 Nurseries Carry This Plant Sorrel or Oregon Oxalis (Oxalis oregana) is a species of the wood sorrel family, Oxalidaceae, native to moist coastal Douglas-fir and redwood forests of western North America from southwestern British Columbia, Washington, Oregon, and California. This area receives considerable summer moisture from fog drip. It is a short herbaceous perennial plant with erect flowering stems 5-15 centimeter tall. The three leaflets are heart-shaped, 1-4.5 centimeter long with purplish undersides, on 5-20 centimeter stalks. The leaflets prefer to be in shade and will fold up when exposed to sun. The flower cluster is 2.4-4 centimeter in diameter, white to pink with five petals and sepals. The hairy five-chambered seed capsules are egg-shaped, 7-9 millimeter long; seeds are almond shaped. This plant will spread into any area where there is moisture and some shade, but it is fairly easy to control because it is shallowly rooted.
Plant Description
Plant Type
Plant Type
Perennial herb

Size
Size
0.16 - 1.3 ft tall
6 ft wide

Form
Form
Spreading

Growth Rate
Growth Rate
Fast

Flower Color
Flower Color
Pink, White

Flowering Season
Flowering Season
Winter, Spring

Wildlife Supported
 


 
Butterflies & moths hosted ( 4 likely * ) SHOW ALL

Landscaping Information
Sun
Sun
Part Shade

Moisture
Moisture
Moderate - High

Summer Irrigation
Summer Irrigation
Max 1x / month once established

Nurseries
Nurseries

Cold Tolerance
Cold Tolerance
Tolerates cold to 25° F

Soil Drainage
Soil Drainage
Medium

Soil Description
Soil Description
High organic content forest soil. Soil PH: 5.0 - 8.0

Common uses
Common uses
Groundcovers, Deer Resistant

Companion Plants
Companion Plants
Use with other shade and moiSture loving foreSt plants such as Wild Ginger (Asarum caudatum), Redwood Violet (Viola sempervirens), WeStern Sword Fern (PolyStichum munitum), Common Trillium (Trillium chloropetalum), and Fawn Lily (Erythronium species).

Maintenance
Maintenance
Remove runners as needed

Propagation
Propagation?
Rooted sections.  For propagating by seed: No treatment. (Emery and Frey 1971).

Sunset Zones
Sunset Zones?
4, 5, 6, 7, 8, 9, 14*, 15*, 16*, 17*, 20*, 21*, 22*, 23*, 24*

Natural Setting
Site Type
Site Type
Moist, shady places; near woodland streams and creeks. Typically under redwood trees or large woodland shrubs.

Climate
Climate
Annual Precipitation: 21.2" - 96.8", Summer Precipitation: 0.25" - 3.10", Coldest Month: 40.2" - 50.2", Hottest Month: 58.5" - 73.0", Humidity: 0.01" - 20.93", Elevation: 7" - 3188"

Alternative Names
Common Names: Redwood Sorrel, Redwood-sorrel


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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