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

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

10a Exothecial cells in central part of urn predominantly oblong, up to 60 pm; peristome teeth 300-450 pm long, in freshly deoperculate capsules stellate-straight, scarcely twisted, orange; hair-point coarse, of variable length; urn usually with 0-4(6) stomata at base, but sometimes more, pores rudimentary or lacking; central strand distinct (> 6 cells); spores 8-11 pm S. crassipilum (calcareous rocks, often on concrete) 10b Exothecial cells predominantly isodiametric and transversely elongate; peristome teeth 300-710 pm long, strongly curved, bent clockwise and twisted; stomata with distinct pores present; hair-point fine, of variable length; central strand absent or narrow (< 6 cells); spores (9)11-15(19) pm 11 11a Peristome teeth forming a dome above the urn mouth, (410)450-700 pm long, very finely and longly pointed, red; columella not falling with the lid; plants often black, hair-point absent or short (0-0.18 mm) S. trichodon (moist calcareous rocks) aa) urn never cyathiform, length / width ratio 1.6-2.4, plants brownish, never jet-black S. trichodon var. nutans bb) urn often cyathiform, length / width ratio 1.3-2.1, plants often jet-black S. trichodon var. trichodon lib Peristome teeth reflexed or spreading, 320-710 pm long, their points may be bent upwards, but never form a dome, red-orange; columella falling with the lid 12 12a Urn 0.7-1.0 mm long and 0.5-0.65 mm wide, exothecial cells quadrate to transversely rectangular, in regular perpendicular rows, peristome teeth 320-400 pm; costa strongly papillose on abaxial side in upper half of leaf, papillae increasing in length towards leaf apex (up to 9-11 pm high), leaf margin strongly and irregularly denticulate to serrate in upper part of leaf; perichaetial leaves 0.5-0.8 mm wide, small plants S. lancifolium (shaded siliceous, rarely calcareous rocks) 12b Urn 0.9-1.35 mm long and 0.5-0.85 mm wide, exothecial cells isodiametric, but pattern less regular; peristome teeth 400-700 pm; leaf margin finely denticulate or rarely smooth, costal papillae lower; perichaetial leaves 0.8-1.5 mm wide, medium-sized plants S. apocarpum (calcareous or siliceous substrata)