KEY TO THE SPECIES

1Stamens 8 (very rarely 4); outer stamens (including appendages) broader than long with widely divergent ± acute glands. Leaves obovate (rarely elliptic) with rounded, obtuse, frequently retuse apices. Tepals in ± equal whorls, usually ± pale cream green
1'Stamens 4, including appendages longer than broad, with slightly divergent ± obtuse glands (but see ssp occidentale). Leaves lanceolate to elliptic with attenuate to acuminate (rarely rounded obtuse) apices. Tepals in unequal whorls, usually pale maroon-brown, pinkish or purplish