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      Oregon oxalis plant aka Redwood Sorrel (Oxalis oregana). One of 100+ species of Pacific Northwest native plants available at Sparrowhawk Native Plants, Native Plant Nursery in Portland, Oregon.
      Close-up Oregon oxalis flower aka Redwood Sorrel (Oxalis oregana). One of 100+ species of Pacific Northwest native plants available at Sparrowhawk Native Plants, Native Plant Nursery in Portland, Oregon.
      Oregon oxalis plant aka Redwood Sorrel (Oxalis oregana). One of 100+ species of Pacific Northwest native plants available at Sparrowhawk Native Plants, Native Plant Nursery in Portland, Oregon.

      Oregon Oxalis

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      Oxalis oregana

      • Size at maturity: 8" tall, 2-3' wide
      • Canopy layer: groundcover
      • Light requirements: part sun/part shade, full shade
      • Moisture requirements: moist soil
      • Special features: perennial, semi-evergreen

      Oxalis oregana, also known as Redwood sorrel, is a species of the wood sorrel family, Oxalidaceae, native to moist Douglas-fir and Coast Redwood forests of western North America from southwestern British Columbia, Washington, Oregon, and California. This attractive groundcover can spread vigorously when planted in favorable conditions. Oregon oxalis photosynthesizes at relatively low levels of ambient light (1/200th of full sunlight). When direct sunlight strikes the leaves
      they fold downwards; when shade returns, the leaves reopen. This process
      only takes a few minutes and the movement is observable to the eye. (EMSWCD, 2019)


      Photo Credit 1 & 2: Tara Lemezis

      Photo Credit 3: Tracy Cozine