Studies on the genus Mastigolejeunea (Marchantiophyta: Lejeuneaceae): Mastigolejeunea gradsteinii Sukkharak sp. nov.

Abstract

The liverwort Mastigolejeunea gradsteinii Sukkharak sp. nov. (Lejeuneaceae) is described from Malaysia. The new species is characterised by (1) rigid stem with epidermal cells as large as medullary cells, (2) apiculate leaf apex, (3) curved lobules without teeth, and (4) perianths with 7–8 keels.

Keywords:

• Lejeuneaceae
• Liverworts
• Malaysia
• Mastigolejeunea gradsteinii
• Morphology
• Taxonomy

Acknowledgements

I express my gratitude to the curator of the Herbarium Haussknecht of Friedrich-Schiller-Universität Jena (JE) and K.-T. Yong (KLU) J. Hentschel (Jena), for making the specimens available, B.-C. Ho (Singapore) R.-L. Zhu (China), and T. Pócs (Hungary) for literature, and I am very grateful to S. R. Gradstein (Paris) for correction of the manuscript. The research was supported by a Junior Research Fellowship of the French Embassy in Thailand.

Taxonomic Additions and Changes: Mastigolejeunea gradsteinii Sukkharak sp. nov.