KEY TO THE SUBSPECIES

1Anthers 1.5-2 mm long. Style 2½-4 mm long during anthesis.
1'Anthers 2-3 mm long. Style 1½-2½ mm long during anthesis.
2Filaments c. 2 mm long during anthesis. Ovaries c. 0.7 by 0.5 mm.
2'Filaments c. 0.5 mm long during anthesis. Ovaries c. 0.5 by 0.3 mm.