Click the number at the start of a key lead to highlight both that lead and its corresponding lead. Click again to show only the two highlighted leads. Click a third time to return to the full key with the selected leads still highlighted.
1 Stem leaves 0-1; basal leaves obtuse or rounded at the apex; petals 3-5 mm long, greenish-yellow (or reddish); pedicels 1-5 mm long
..2 Stem leaves 2, opposite, well below the lowermost flower
..2 Stem leaves 4, alternate, the uppermost subtending the lowermost flower