Sour grass (Oxalis pes-caprae)

Purple wood sorrel (Oxalis purpurea)

Redwood sorrel (Oxalis oregana)

Sour grass (Oxalis pes-caprae) aka Bermuda buttercup

Flower

Sour grass (Oxalis pes-caprae
Family: Oxalidaceae
Indigenous to South Africa but wide-spread in California
Tangy and edible in small quantities
Channing Avenue
Palo Alto
March 19, 2013

Flowers

Sour grass (Oxalis pes-caprae
Family: Oxalidaceae
Channing Avenue
Palo Alto
March 19, 2013

Flowers and leaves

Sour grass (Oxalis pes-caprae
Family: Oxalidaceae
Channing Avenue
Palo Alto
March 19, 2013

Bermuda buttercup

Bermuda buttercup (Oxalis pes-caprae
Family: Oxalidaceae
Alum Rock State Park
January 12, 2020
Canon 7dmark2

Build me up

Bermuda buttercup (Oxalis pes-caprae
Family: Oxalidaceae
Alum Rock State Park
January 12, 2020
Canon 7dmark2

Oxalis

Bermuda buttercup (Oxalis pes-caprae
Family: Oxalidaceae
Alum Rock State Park Bioblitz
December 8, 2018
Canon 7dmark2

Mustard and oxalis

Sour grass (Oxalis pes-caprae
Family: Oxalidaceae
Enroute to Año Nuevo
February 24, 2013

Purple wood sorrel (Oxalis purpurea)

Oxalis violetted

Purple wood sorrel (Oxalis purpurea)
False Bay overlook
Peninsula tour
April 14, 2013
Plant is indigenous to South Africa.

Redwood sorrel (Oxalis oregana)

Fern and flower

Redwood sorrel (Oxalis oregana)
Family: Oxalidaceae (woodsorrel family)
Stanford-to-the-Sea
May 4, 2019
Canon 7Dmark2

Sorrel

Redwood sorrel (Oxalis oregana)
Family: Oxalidaceae
Stanford-to-the-Sea
April 28, 2018
Canon 7Dmark2

Sorrel flower

Redwood sorrel (Oxalis oregana)
Family: Oxalidaceae
Stanford-to-the-Sea
April 28, 2018
Canon 7Dmark2

Redwood sorrel

Redwood sorrel (Oxalis oregana)
Family: Oxalidaceae (woodsorrel family)
Muir Woods
December 29, 2016
Canon rebel T5i

Other relevant links