KEY TO THE SPECIES

1Styles 5
1'Styles 3
2Flowers white; leaves ovate to narrowly elliptic or ovate
2'Flowers pink; leaves linear to narrowly elliptic
3Plant entirely glabrous
3'Stems and leaves pubescent
4Calyx 20-30 mm long
4'Calyx not more than 15 mm long
5Lamina of petals 3-5 mm
5'Lamina of petals 7-10 mm