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Marchesinia principensis (Marchantiophyta, Lejeuneaceae), a new liverwort species from Príncipe, West Africa

FRANK MÜLLER, JAMES R. SHEVOCK

Abstract


A new species, Marchesinia principensis (Marchantiophyta, Lejeuneaceae), is described and illustrated from Príncipe, Republic of São Tomé and Príncipe, West Africa. It was discovered in cloud-mist hardwood forests at elevations of 500–690 m. This new species most closely resembles Marchesinia excavata, but differs in the broad reniform underleaves, 5–6 × as wide as the stem, >2 × as wide as long, the narrow angle (< 90°) that the ventral margin of the lobe makes with the keel, and the usually flat ventral margin of the lobe. M. principensis is, furthermore, a more robust plant than M. excavata.


Keywords


Africa, Hepaticae, liverworts, Marchesinia excavata, São Tomé and Príncipe, taxonomy, Bryophytes

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DOI: http://dx.doi.org/10.11646/phytotaxa.338.2.5

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ISSN 1179-3155 (print); ISSN 1179-3163 (online)

Published by Magnolia Press, Auckland, New Zealand