Viola verecunda var. verecunda(hidden violet, "Tsubosumire")
Japanese name: ツボスミレ（壷菫、坪菫） Scientific name:Viola verecunda var. verecunda
[Overview]
A perennial commonly found in damp places from flatlands to mountains.
Many aerial stems arise from the base and extend slanting upward, reaching about 5–25 cm tall.
The leaves are kidney-shaped to heart-shaped, 2–3.5 cm wide, with low teeth on the margins.
Some plants have leaves that are purplish on the underside.
The stipules are lanceolate, with entire margins or a few teeth.
The flowers are borne at the tips of erect flower stalks arising from the leaf axils; they are about 1 cm across and white, with purple lines in the center of the lip petal.
The bases of the lateral petals are hairy, and a short spur of 2–3 mm extends behind the flower.
It does not usually produce aerial runners, and having basal leaves at flowering time is one of its characteristics.
The summer flowers are cleistogamous.
The fruit is a capsule that splits into 3 when ripe and scatters the seeds.
[Notes]
The alternative name Nyoi-sumire compares the shape of the leaf to nyoi, a type of Buddhist ritual implement.
