|Scientific name:||Oxalis acetosella L.|
|Swedish name:||Harsyra, gökmat, harväppling, surklöver|
|Nederlandse naam:||Witte klaverzuring|
|Plant Family:||Oxalidaceae, Harsyreväxter|
|Life form:||Rhizome geophytes|
|Stems:||Underground creeping stem, lacking a permanent woody stem, no aerial stem|
|Leaves:||Heart-shaped leaves folded through the middle, in groups of three leaves atop a hairy, reddish brown stalk; three-nerved, the leaf-stalks not winged|
|Flowers:||Thin white petals with red veins|
|Flowering Period:||May, June|
|Fruits:||Capsule divided into five chambers, with two black, smooth seeds in each chamber; When the capsule is mature it is stretched, and this causes it to split open and eject the seeds, by a catapult motion, to some distance.|
|Habitat:||All types of woodlands|
Derivation of the botanical name:
Oxalis, Greek oxys, acid, sour, sharp; referring to the taste of the leaves and the stem; Pliny used Latin oxalis, idis, for some species of Rumex.
Acetosella, Latin acetosus, acid, sour, refers to the leaves sour taste; a pre Linnaean name for common sorrel and other plants with acid leaves.