Original Research
Sematophyllum rheophyticum (Bryopsida, Sematophyllaceae), a new rheophytic species from Rwanda
Submitted: 01 December 2015 | Published: 31 May 2016
About the author(s)
William R. Buck, Institute of Systematic Botany, The New York Botanical Garde, United StatesTerry A.J. Hedderson, Department of Biological Sciences, University of Cape Town, South Africa
Abstract
Objectives: The objective of this study is to describe a new species of Sematophyllum from Rwanda, part of the mega-diverse Albertine Rift system.
Methods: Light microscopy was used to compare anatomical and morphological details of the putative new species with specimens of other members of the genus with which it could potentially be conspecific.
Results: Sematophyllum rheophyticum W.R. Buck & Hedd. was described as new and is currently known only from the type locality at Gisakura, Nyungwe National Park, Rwanda. It is distinguishable from all congeners by a unique combination of characters including the concave, abruptly acuminate leaves, the alar areolation and the rheophytic habitat.
Conclusion: Sematophyllum rdicum is a new species, defined by a combination of several anatomical characters, known currently only from the type locality. Furthermore, it is one of only a few species in the genus that occurs in rheophytic habitats. Its phylogenetic relationships are obscure and will probably need to be evaluated with molecular evidence.
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