Bryophytes of St Helena, South Atlantic Ocean. 6. Cheilolejeunea (Spruce) Schiffn. (Jungermanniales: Lejeuneaceae), including C. microscypha (Hook.f. & Taylor) M.Wigginton, comb. nov. and C. rotalis (Hook.f. & Taylor) M.Wigginton, comb. nov.

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.

Keywords:

• Aureolejeunea
• Cheilolejeunea
• Jungermanniales
• Lejeuneaceae
• Liverwort
• St Helena
• Taxonomy

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.