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Taxonomic results of the Bryotrop expedition to Zaire and Rwanda : 6., Aytoniaceae, Marchantiaceae
(1993)
A subspecies known with certainty only from Europe. Its electrophoretic pattern separates it clearly from the other subspecies of M. polymorpha , but its morphological characteristics are not clearly distinctive (Boisselier & Bischler 1989) . However, the tropical African specimens from Kenya and Tanzania, together with those of Rwanda, probably belong to this subspecies. It grows on wet soil in Senecio refractisquamata paramo and on cliffs in Hagenia- Dombeya forests, between 2700 and 3600 m. M. polymorpha has not yet been recorded from Rwanda.