For the other species, find a link below the page.
Viola
faurieana var. rhizomata f. 'unpublished' / Midoritsurutachitsubosumire ミドリツルタチツボスミレ
The plants on this page are an
unpublished-as-yet form of Viola
faurieana var. rhizomata, both
the sepals and petals green with partly purple. There was no other
difference I could observe. Bloom time: April-May.