KEY TO THE SPECIES

1Woody climber. Tepals 10 or fewer.
1'Trees or shrubs. Tepals 13 or more.
2Filaments relatively long and thin; mature anthers once or twice as long as the filaments. Seed smooth
2'Filaments relatively short and broad; mature anthers at least 4 times as long as the filaments. Seed with longitudinal or reticulate ridges