New occurrences of the liverwort Treubia insignis (Treubiaceae, Marchantiophyta) from the southern Philippines and insights into its distribution and habitat preferences

Abstract

Treubia insignis, previously known for the Philippines from a single collection obtained in 1913, is rediscovered just over a century later, this time from the southern Philippines. Habitat preference, at least in the southern Philippines, is along riparian corridors of small streams in high-quality montane hardwood tropical rainforests.