Abstract
Two little known species of Cheilolejeunea, C. microscypha (Hook.f. & Taylor) M.Wigginton, comb. nov. (a reinstated St Helena liverwort), and C. rotalis (Hook.f. & Taylor) M.Wigginton comb. nov., endemic to St Helena, South Atlantic Ocean, are described and illustrated, and oil bodies of C. ascensionis (Hook.f. & Taylor) Grolle are newly described and illustrated.
The 2005 survey was supported by the British Government’s Overseas Territories Environmental Programme. My thanks also to staff at the Department of Agriculture and Forestry Conservation & Wildlife Section, St Helena, for permission to collect bryophytes in Diana’s Peak National Park; to Dr Rebecca Cairns-Wicks and the St Helena National Trust for logistical support and other help on the island. I am grateful to Len Ellis for providing facilities at the Natural History Museum, London; to Genevieve Lewis-Gentry of the Farlow Herbarium, Harvard University, for the loan of the type of Jungermannia microscypha, and photographs of the type specimens of both J. microscypha and J. rotalis; to Michelle Price for the loan of the isotype of Lejeunea rotalis from the Stephani herbarium (Geneva); to Jochen Heinrichs for the loan of specimens of Cheilolejeunea (Aureolejeunea) fulva from Göttingen.
Taxonomic Additions and Changes: Cheilolejeunea microscypha (Hook.f. & Taylor) M.Wigginton, comb. nov., Cheilolejeunea rotalis (Hook.f. & Taylor) M.Wigginton, comb. nov.