Bazzania tridens (Reinw., Blume & Nees) Trevis.

NOTES

The most widespread species of Vietnam and of the whole Southeast Asia (Khotimperwati et al. 2018). The side leaves are elongate-ovate with tridentate apex. The most important character is the underleaf, consisting only of hyaline cells, except for a few green basal cell rows. According to their shape four varieties are distinguished. These have been described originally, as separate species, but they are interconnected with many transitional forms (Pócs 1969).