KEY TO THE SPECIES

1All leaves shortly but distinctly petiolate, broadly ovate, never ciliate. Wall of cells of capsule with protruding, reticulate venation. Lower sepals equal to or somewhat smaller than the other sepals. Keel outside at lower side minutely papillose
1'Leaves subsessile except the basal ones, ovate to ovate-lanceolate, margin glabrous or often set with stiff ciliae. Walls of cells of capsule without reticulate, protruding venation, often shortly sparsely hairy. Lower sepals distinctly larger than the other sepals. Keel not papillose outside