Oxalis oregana Oxalis oregana growing in short tree tubes. Oxalis oregana mother block about to be divided. Oxalis oregana divisions placed in 4-inch containers. Oxalis oregana growing in 4-inch containers at native plant nursery near Seattle, WA. Oxalis oregana with stolons. Oxalis oregana growing as a groundcover in a native plant landscape near Seattle, WA. Close-up of an Oxalis oregana flower. Oxalis oregana 'Select Pink' cultivar growing in 4-inch containers at a nursery near Seattle, WA.