B. Papp szerk.: Studia Botanica Hungarica 39. 2008 (Budapest, 2008)

Erzberger, P.; Schröder, W.: The genus Schistidium (Grimmiaceae, Musci) in Hungary

Fig. 26. Distribution of Scbistidium papillosum Scbistidium platyphyllum (Mitt.) H. Perss. (Figs 27, 29) Plants small to medium-sized, forming dense or lax tufts. Central strand distinct, but narrow. Hair-point 0-0.3 mm, frequently yellow or reddish in lower part or throughout, thin and narrow, not decurrent. Costa smooth, margins entire or irregularly denticulate just below apex. Lamina smooth, in upper and central parts partly bistratose or more rarely unistratose. Lamina cells slightly incrassate, collenchymatous, in upper part of leaf ± isodiametric and shortly elongate, 9-11 urn wide, in central and lower parts more elongate. K+ red. Sporophytes occasional to frequent, immersed. Urn yellowish to red-brown, subspherical to obovoid (cyathiform when old), length/width ratio 0.8-1.3 (BLOM 1998), not measured in Hungarian material. Exothecial cells thin-walled or slightly incrassate, in central and lower part of urn predominantly shortly elongate, forming a ± regular pattern. Stomata absent. Peristome teeth 380-570 urn, red, tapering to a narrow point, semiperfoated in lower part, strongly irregularly perforated in upper part. Spores finely granulöse, 16-24 um. This is in Hungary the only species of the Rivulare group, which is characterised by spores (16-24 urn) larger than those of the Scbistidium apocarpum complex ((8-)9-10.4-12(-19) urn).