WSU Clark County Extension
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Redwood Sorrel

Scientific name: Oxalis oregona
Taxonomy
Family:Oxalidaceae
Type:Groundcovers evergreen
Native:YES
Plant Requirements
Zone:6 to 8
Sun:Partial shade to full shade
Moisture:Medium
Plant Characteristics
Height:0 ft
Width:2 ft
Bloom:Summer flowers
Bloom Time:April to September
Bloom Color:Pink
Additional Characteristics
Trees


Fruit

Leaves


Bark
Wildlife value

Poisonous
Description Redwood sorrel, also referred to as Oregon sorrel, is a native perennial groundcover that blankets the Douglas fir forests of the Pacific Northwest, as well as the redwood forests of California.

  Morphology:
Forming a solid carpet of shamrock foliage that spreads by rhizomes, this species is classified as a herbaceous perennial. The foliage is held 2.5”- 4” above the ground. Leaves consist of 3 leaflets which collectively grow 1.5” by 2.5” across. Funnel shaped flowers are borne on longer stalks and range from white to light pink.

  Adaptation:
Redwood sorrel is widely adapted to the west slopes of the Cascades, extending its range from Coastal British Columbia and the Olympic Mountains of Washington well into central regions of California where coastal redwood grows. It can be found growing both on moist and dry sites, but does best where the soil is cool and shaded. It will not grow in full sun.

  Pests:
None reported.
For assistance, contact Dr. Charles Brun (brunc@wsu.edu), (360) 397-6060 5701
Computing and Web Resources, PO Box 6234, Washington State University, Pullman WA 99164-6234