Oxalis oregana
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Redwood Sorrel or Oregon Oxalis (Oxalis oregana) 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.[1][2]
It is a short herbaceous perennial plant with erect flowering stems 5-15 cm tall. The three leaflets are heart-shaped, 1-4.5 cm long with purplish undersides, on 5-20 cm stalks. The inflorescence is 2.4-4 cm in diameter, white to pink with five petals and sepals. The hairy five-chambered seed capsules are egg-shaped, 7-9 mm long; seeds are almond shaped.[3]
Redwood sorrel photosynthesises 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. Taking only a few minutes, this movement is observable to the eye.[4]
The leaves of Oxalis oregana were eaten by Native Americans, probably in small quantities, since they contain mildly toxic oxalic acid, whence the genus name.[5]
Read about Oxalis oregana in the Standard Cyclopedia of Horticulture
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Oxalis oregana, Nutt. Low: lfts. broadly obcordate, 1-2 in. wide: fls. white or rosy, yellowish at base, deeper veined. N. W. coast.
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References
- ↑ Burke Museum — WTU Herbarium Image Collection
- ↑ Plant Profile for Oxalis oregana — USDA Plant Database
- ↑ SAPS — Science And Plants for Schools
- ↑ E-Flora BC — Electronic Atlas of the Plants of British Columbia
- ↑ Pojar, Jim; Andy MacKinnon (2004). Plants Of The Pacific Northwest Coast: Washington, Oregon, British Columbia & Alaska. Lone Pine Publishing. ISBN 978-1551055305.
- Standard Cyclopedia of Horticulture, by L. H. Bailey, MacMillan Co., 1963
External links
- w:Oxalis oregana. Some of the material on this page may be from Wikipedia, under the Creative Commons license.
- Oxalis oregana QR Code (Size 50, 100, 200, 500)
