Myuroclada

Plants medium-sized, in loose mats, pale silvery green. Stems creeping to erect-arcuate, often attenuate, strongly julaceous, unbranched to weakly irregularly branched, branches terete-foliate; central strand present; pseudoparaphyllia orbicular-triangular; axillary hairs of 2–4 cells. Stem leaves erect-appressed, crowded, imbricate, orbicular to broadly ovate, concave, not or indistinctly plicate; base moderately decurrent; margins nearly entire to serrulate; apex very broadly acute to rounded, short-apiculate when young, blunt when mature; costa to mid leaf or slightly beyond, moderately stout, terminal spine absent; alar cells smaller than basal juxtacostal cells; laminal cells short-rhombic to rhombic. Branch leaves similar. Sexual condition dioicous. [Seta red-brown, smooth. Capsule inclined to horizontal, nearly black when old, oblong, weakly curved; annulus separating in fragments; operculum long-conic, obliquely rostrate; peristome xerocastique, perfect. Calyptra naked. Spores 12–16 µm].

Distribution

Alaska, e Asia (Japan, Korea, Russia), introduced in Europe. The above description of the sporophyte is from Asian material.

Discussion

Species 1.

The above description of the sporophyte is from Asian material.

Selected References

Steere, W. C. and W. B. Schofield. 1956. Myuroclada, a genus new to North America. Bryologist 59: 1–5.

Lower Taxa

Myuroclada maximowiczii