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Published In: Bulletin of the Buffalo Society of Natural Sciences 32: 112. 1993. (Bull. Buffalo Soc. Nat. Sci.) Name publication detail

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Acceptance : Accepted
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Mironia is a Neotropical, high elevation genus. Its species have a characteristic reddish color, leaves when wet that are spreading from an erect-sheathing base, long, cylindric capsules, and well-developed, spirally twisted peristome teeth. It is very similar to Bryoerythrophyllum and Rhexophyllum which differ from Mironia in having leaves that are either unistratose at the margins (Bryoerythrophyllum) or irregularly bistratose throughout the lamina (Rhexophyllum). Rhexophyllum also differs from Mironia in having a stem hyalodermis. The distinctions between the three genera, however, are blurred by the presence of bistratose upper leaf cells in some Bryoerythrophyllum species and some collections of M. elongata (first noted by Bartram 1955).

Leptodontium is similar to Mironia in plant size, leaf shape and in having species with dentate upper leaf margins. It differs from Mironia in its usually yellowish green color, unistratose leaf margins, peristome of 16 erect teeth, and the absence of a stem central strand.


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Mironia Zand., Bull. Buffalo Soc. Nat. Hist. 32: 112. 1993.

Morinia Card., Rev. Bryol. 37: 124. 1910, not Morinia Berlese & Bresadola (1889) or Morinia Linn. (1753). 

Plants small, medium- or robust-sized, reddish green above, distinctly red to reddish brown below. Stems with sclerodermis and central strand, irregularly branched, sparsely or densely radiculose.  Leaves erect-sheathing at base, twisted, incurved above when dry, erect-spreading to spreading from the top of the sheathing base when wet, oblong to oblong-lanceolate, concave or keeled; apices acute to obtuse; margins bistratose, recurved in lower 3/4 or to near the apex, entire or dentate above, unbordered; costa subpercurrent, percurrent or excurrent as a sharp, smooth mucro, guide cells, ventral and dorsal stereid or substereid bands present, and ventral epidermal layer usually present; upper cells firm-walled, oblate to irregularly quadrate or rounded-hexagonal, pluripapillose by thick, c-shaped papillae, basal cells rectangular, smooth, thin-walled, alar cells not differentiated. Perichaetial leaves sheathing. Dioicous. Inflorescences terminal. Setae elongate. Capsules cylindric; opercula long-rostrate; annuli usually well-developed; peristome of 32, long, spirally twisted teeth, basal membrane short. Calyptrae cucullate, smooth.


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