Oxalis spiralis

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Oxalis spiralis
Oxalis spiralis vulcanicola.jpg
Scientific classification e
Kingdom: Plantae
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Oxalidales
Family: Oxalidaceae
Genus: Oxalis
Species: O. spiralis
Binomial name
Oxalis spiralis
G.Don subsp. vulcanicola (Donn.Sm.) Lourteig, (1980 publ. 1981)

Oxalis vulcanicola Donn.Sm., 1897

Oxalis spiralis, the spiral sorrel, is a species of the genus Oxalis, the largest genus in the wood sorrel family Oxalidaceae.

Its subspecies O. s. ssp. vulcanicola (Donn.Sm.) Lourteig is known as volcanic sorrel or velvet oxalis.

Apparently not native to the US, though perhaps cultivated from native species. USDA Plants database[1] shows both O. spiralis and ssp. vulcanicola as nonnative, but unlisted as introduced either.

Close-up picture of oxalis spiralis