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

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

6b Exothecial cells thin-walled, predominantly oblong; stomata absent; hairpoint short or absent, 0-0.3 mm, smooth or finely spinulose- denticulate; capsule-bearing branches not in fascicles; leaves 1.4-2.3 x 0.5-1.0 mm, obtusely keeled, symmetric, margins entire or irregularly denticulate immediately below apex S. platyphyllum subsp. platyphyllum (base-rich rocks in or beside rivers or streams, rarely submerged) 7a Peristome absent or rudimentary (< 25 pm), stomata 3-6 per urn; hair-point usually long, finely denticulate; perichaetial leaves plicate; operculum mamillate; plants small to medium-sized S. flaccidum (siliceous rocks) 7b Peristome perfect, stomata 3-10 per urn; hair-point short or long, coarsely spinulose; operculum rostrate, but rostrum sometimes short; plants small 8 8a Hair-point short, 0-0.45 mm, fine, flattened and mostly broadened towards insertion; peristome teeth strongly and irregularly perforated, pattern of exothecial cells not very irregular, stomata small, 3-8 per urn S. confertum (exposed siliceous or base-rich rocks) 8b Hair-point usually long, 0-0.8 mm, coarse, terete and narrow throughout, not or shortly and narrowly decurrent, in young leaves strongly spinulose with some very long spines (22-30(-75) pm); peristome teeth almost entire or narrowly perforated in 1(2) rows, exothecial cells forming an irregular pattern; stomata 6-8(10) per urn S. spinosum (exposed siliceous rocks) 9a Leaf margin or dorsal side of costa in upper half of leaf with papillae or projecting cells (denticulate) 10 9b Leaf margin and dorsal side of costa smooth (few papillae may occur at leaf apex immediately below the hair-point, in S. dupretii also further down) 13