Schistochila, DUMORT.

Thouvenot, Louis, 2021, Schistochila gradsteinii sp. nov., a new species from New Caledonia related to S. vitreocincta (Schistochilaceae, Marchantiophyta), with a key to the local species and a description of the gynoecium of S. integerrima, Cryptogamie, Bryologie 20 (2), pp. 11-18 : 17

KEY TO THE NEW CALEDONIAN SPECIES OF SCHISTOCHILA DUMORT.

1. Leaf cells with huge trigones, seemingly three-layered; stem epidermis distinctive, with thin-walled cells, medullar cells more or less evenly thick walled; leaf margins entire, underleaves lacking ................................................. 2

— Leaf cells with simple trigones, large to inconspicuous, stem cells more or less homogeneous, cortical cells less differentiated with wall cells moderately thick becoming progressively thinner toward central medulla; leaf margins entire or toothed to laciniate, underleaves present or lacking on sterile shoots................................. 3

2. Dorsal leaf lobes slightly larger than ventral lobes, both lobes short rectangular-oblong. Leaves with a broad hyaline border; stem medullar cells very thick walled, the walls thicker than the lumina.................................. ....................................................................................... Schistochila vitreocincta (Herzog) X.L.He & Glenny

— Dorsal leaf lobes conspicuously smaller than ventral lobes which are oblong-lanceolate, acuminate to obtuse apiculate. Leaves without hyaline border; stem medullar cells unevenly thickened, the walls thinner than the lumina ............................................................................................................. Schistochila gradsteinii sp. nov.

3. Underleaves lacking in sterile shoots............................................................................................................ 4

— Underleaves present in sterile shoots............................................................................................................ 5

4. Ventral lobe apex entire ................................................................................... Schistochila integerrima Steph.

— Ventral lobe apex toothed-ciliate ................................ Schistochila aligera (Nees & Blume) J.B. Jack & Steph.

5. Underleaves and leaf lobe with additional ciliate lobes............................... Schistochila sciurea (Nees) Schiffn.

— Underleaves and leaf lobes without additional lobes .......................................... Schistochila caledonica Steph.