Lejeunea robbertiana (Lejeuneaceae), a new liverwort species from New Caledonia

The new species, Lejeunea robbertiana G.E. Lee & Pócs, from New Caledonia is described and illustrated. It is characterized by the abundance of ribbon-like propagules, which are usually 4 cells wide and found on the leaf margins. The leaf cells have well-developed trigones and conspicuous intermediate thickenings, up to 3 per cell. The distantly arranged underleaves with deeply bifid lobes, the pyriform perianth with 5 keels, and autoicy are also the distinguishing characteristics of the new species.