@PorchSitting1 @cpm5280 @ClaraJeffery This is Oxalis pes-caprae, common name Bermuda buttercup or Bermuda sorrel (even though it’s from South Africa.) Some people call it sour grass. It’s an invasive weed, not to be confused with our native redwood sorrel, Oxalis oregana.

— JCF4004 (@JCF4004) 2021.2.22

@carrebsnid i think it could be oxalis oregana?

— astronoprimitivist (@bispectral) 2020.5.12

A closeup of the ecosystem on a fallen Redwood log: a fern leaf, moss, and Redwood Sorrel (Oxalis oregana). [20160914] #nature #naturelovers #naturephotography #photography https://t.co/MaZeclaG5O

— Al Andersen (@alandersenphoto) 2020.1.14