June 2013. A shade tolerant plant from Palau.What is it?

A member wrote, the groundcover herb is a species of Hemigraphis, most likely Hemigraphis alternataor Hemigraphis reptans. These two species are difficult to tell apart and until relatively recently (2011) specimens that had been collected in Queensland were ‘lumped’ together as Hemigraphis alternata,although it is now known that both species are present and have become naturalised in Queensland.

It’s not possible to determine the species from a photo, but if you could obtain a copy of the following reference it might assist:

Moylan EC, Pennington RT, Scotland RW (2002) Taxonomic account of Hemigraphis Nees (Strobilanthinae—Acanthaceae) from the Philippines.Kew Bulletin 57: 769-825.