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

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

13a Exothecial cells in central and lower part of urn predominantly isodiametric and transversely elongate 14 13b Exothecial cells predominantly oblong 16 14a Peristome teeth strongly curved, often semi-perforated in lower part and with small perforations in longitudinal rows in upper part, leaves mostly falcate to falcato-secund, mostly large plants S. apocarpum (longipilose plants; calcareous or siliceous substrata) 14b Peristome teeth straight or slightly curved, entire or irregularly perforated in upper part; leaves usually straight; small to medium-sized plants 15 15a Perichaetial leaves broad, 0.8-1.1(1.25) mm wide (urn not or slightly exposed in lateral view); hair point structure intermediate between fine and coarse: rather coarse and stiff, but remnants of cell walls mostly clearly visible, broad (as broad as chlorophyllose part of the apex), up to 0.7 mm long, intensely white, urn smooth, plants glossy S. pulchrum (on siliceous or calcareous rocks in humid sites) 15b Perichaetial leaves narrow, 0.5-0.6 mm wide (urn much exposed in lateral view); hair point fine but straight when dry, consisting of few cells, distinctly narrower than the chloropyllose part of the apex, up to 0.15 (0.25) mm long; urn finely striolate after dehiscence, plants dull, small, growing in compact cushions 5. dupretii (exposed calcareous, less often siliceous rocks) 16a Basal marginal cells with thick transverse walls, more or less hyaline; urn hemispherical to ovate, peristome teeth short (< 340 pm) and cribrose (i.e. with numerous pits and holes); hair-point mostly fine and long (except S. brunnescens), flattened at base and composed of cells with clearly visible lumen 17 16b Basal marginal cells usually without thick transverse walls (examine several leaves), sometimes elongate; urn ovate to oblong, peristome teeth 220-430 pm; hair-point always coarse, variable in length, terete or indistinctly flattened at base 18