I have found a Riccardia sp. in Himalayas with comparatively larger epidermal cells than the medullary cells (in stem section), however seems different from recently described R. elizabethae primarily due to lack of trigones in cells. Further, the epidermal cells shows brown pigmentation also. Can someone please inform about any other species with these character and suggest any reference about the same.
It may be worthwhile to compare your material with southern African Riccardias treated by S.M. Perold. Some of these species appear to have epidermal and medullary cells of at least the same size. The pdf-files are available to download from the Bothalia/ABC website: http://www.abcjournal.org/index.php/ABC
Bothalia 31: 183–187 (2001); 32: 15–19 (2002); 32: 181–184 (2002); 33: 99–104 (2003)
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