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Published In: Bryologia Europaea 5: 95 (fasc. 46–47. Mon. 1). 1851. (Bryol. Eur.) Name publication detail

Project Name Data (Last Modified On 4/3/2009)
Acceptance : Accepted
Project Data     (Last Modified On 4/3/2009)
General Reference:

Notes     (Last Modified On 4/3/2009)
general taxon notes:
Platygyrium is very close to Pylaisiella Kindb. in overall morphology, but differs in having more or less straight branches when dry, well developed broad annuli, free endostome segments with a very low basal membrane and without cilia, and dioicous sexual condition.
The genus Platygyrium consists of four species in the world. Platygyrium denticulifolium C. Müll. was reported by C. Müller (1897) and Levier (1906) from Shaanxi and was still listed from China by Redfearn et al. (1996). However, it was treated as a synonym of Eurohypnum leptothallum (C. Müll.) Ando by Ando (1966). Platygyrium russulum (Mitt.) Jaeg. was reported from Anhui province (H. Qian & K.-H. Tsai 1989) based on a misidentified specimen (K.-H. Tsai 1165, HSNU). This specimen belongs to Pylaisiella polyantha (Hedw.) Grout. At present, one species is found in China.


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19. Platygyrium Schimp. in B.S.G.   平锦藓属   ping jin xian shu
Bryol. Eur. 5: 95 (fasc. 46–47 Mon. 1). 1851, nom. cons.
Plants small, green or yellowish brown, glossy, in loose mats. Stems creeping, irregularly branched, rhizoids numerous; branches short, densely foliate. Stem leaves and branch leaves similar, more or less appressed or somewhat imbricate when dry, erectopatent when moist, ovate-lanceolate to oblong-lanceolate, somewhat decurrent at base, shortly acuminate at apex; margins entire, reflexed below; costae double, very short or indistinct; leaf cells smooth, rhomboidal, apical cells short; alar cells differentiated, in a small group of quadrate cells. Brood bodies usually abundant in the axils of leaves. Dioicous. Inner perichaetial leaves slenderly lanceolate, somewhat sheathing at base. Setae slender, purplish red, smooth; capsules erect, symmetric, cylindrical; annuli well developed, broad, in 2–4 rows of cells, opercula conic, shortly obliquely rostrate; persistent; peristome double; exostome teeth narrowly lanceolate, yellowish brown, distinctly bordered, transversely striolate-papillose (not clearly striolate) at the base on dorsal surface, moderately trabeculate on the ventral surface; endostome segments linear-lanceolate, yellowish, smooth, keeled; basal membrane very low or absent; cilia lacking. Calyptrae cucullate, smooth, naked. Spores small, yellowish, minutely papillose.

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One species is found in China.

1. Platygyrium repens (Brid.) Schimp. in B.S.G.  
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