Western Wood Sorrel, Oregon Wood Sorrel, Redwood Sorrel, Redwood-sorrel, Sour Grass

Redwood sorrel (the former Oxalis oregana var. smallii) as seen at the author's garden in Gresham, OR..........May 3, 2005. This variety of wood sorrel makes an attractive ground cover for the woodland garden to the west of the Cascade Mts.

Close-ups of the flowers of Oregon wood sorrel as seen in forest at the base of Saddle Mountain in the Coast Range of northwestern Oregon..........May 21, 2009.

Oregon wood sorrel beginning to bloom (left) along the Saddle Mountain Trail in the Coast Range of northwestern Oregon........May 2, 2016. The photo at right shows Oregon wood sorrel along the Cape Arago Trail at Shore Acres State Park.........April 19, 2016.

Western wood sorrel as seen along the Neahkanie Mountain South Trail in northwestern Tillamook County, OR.........April 6, 2016.

Western wood sorrel beginning to bloom in the webmaster's Gresham garden.......February 28, 2020.