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Rhynia gwynne-vaughanii: epidermis and stoma

Stoma of RhyniaStoma of Rhynia

Epidermis and stoma. Diameter of the stoma 50 µm. Notice the two guardcells.

Stem of Rhynia

The stem surface of Rhynia gwynne-vaughanii, taken on a fracture in the rock. Width of the stem 1.3 mm.

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