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

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

3a Hair-point coarse, especially well developed in perichaetial leaves; costa dorsally hardly projecting; mid-leaf cells 6-9 pm wide and rounded, dorsal and ventral side of lamina with numerous papillae arranged in rows (examine young leaves!), usually with extended bistratose patches; perichaetial leaves very wide and differing in form from stem leaves; central strand of 3-10 cells S. pruinosum (base-rich or siliceous rocks, esp. basalt and porphyric) 3b Hair-point fine (but mostly straight), costa dorsally prominent; mid-leaf cells 10-12 pm wide and ± sinuose; papillae on both sides of lamina, but less numerous on adaxial side; bistratose patches not conspicuous; perichaetial leaves only slightly wider than stem leaves; central strand of 20-30 cells S. confusum (exposed calcareous rocks, also on old walls and concrete) 4a Urn length / width ratio 0.8-1.3, shape not oblong or oblong-cylindrical (but S. brunnescens - 17a - with oblong exothecial cells, small spores, K+ red and stomata absent sometimes has urns with length / width ratio < 1.3) 5 4b Urn length / width ratio > 1.3, shape oblong to oblong-cylindrical 9 5a Spores 15-24 pm; hair-point absent on most leaves or very short (0-0.3 mm); K+ red; stomata absent or present; leaves 0.5-1.3 mm broad (Rivulare group) 6 5b Spores 8-13 pm; hair-point usually present; K+ yellow; stomata present; leaves 0.3-0.85 mm broad (Confertum group) 7 6a Exothecial cells incrassate, isodiametric, stomata present; hair-point absent; capsule-bearing branches in fascicles of (2-)3-6; leaves 2.1-3.2 X 0.7-1.3 mm, carinate, slightly asymmetric, apex sometimes boat-shaped, leaf margin in upper half of leaf often dentate by projecting cells S. rivulare (siliceous or calcareous rocks in and beside rivers and streams)