What is "spathiostemon"

Spathiostemon is a plant genus of the family Euphorbiaceae first described as a genus in 1826. It is native to Southeast Asia and Papuasia.

1. Spathiostemon javensis Blume - Peninsular Malaysia, Borneo, Java, Lesser Sunda Islands, Philippines, Sulawesi, Maluku, New Guinea, Bismarck Archipelago
2. Spathiostemon moniliformis Airy Shaw - S Thailand

transferred to other genera ( Clonostylis, Homonoia)

1. Spathiostemon forbesii - Clonostylis forbesii
2. Spathiostemon salicinus - Homonoia riparia