Schistidium crassipilum H. H. Blom

Guerra, Juan, Cano, María J., Martínez, Mónica, Jiménez, Juan A. & Gallego, M. Teresa, 2021, Schistidium apocarpum complex (Grimmiaceae, Bryophyta) in the Baetic Mountain Ranges, southern Iberian Peninsula, Cryptogamie, Bryologie 20 (5), pp. 45-71 : 52-54

3. Schistidium crassipilum H. H. Blom

( Fig. 7)

Bryophytorum Bibliotheca 49: 224 (1996).

HABITAT. — Calcareous rocks in exposed or protected sites, rare on siliceous rocks or as an epiphyte on tree bark or stumps, from 650 to 1800 m. Distribution: Figure 8. Widespread throughout the Iberian Peninsula.

DESCRIPTION

Plants

Small to medium-sized, (1.5) 2-3.5 cm long, forming dense or loose tufts, usually brownish to dark olivaceous.

Leaves

Straight or slightly curved, erect to patent, imbricate, triangular-ovate to ovate-lanceolate, sometimes elliptical, acute, 1.5-3 × 0.5-0.8 mm.

Hair-point

Cylindrical, somewhat flattened in lower part, finely to coarsely denticulate-spinulose, 0.1-1 mm long.

Lamina

Smooth, sometime denticulate-papillose at margins in upper part, in upper and central part irregularly 2-stratose to 1-stratose with 2-stratose spots; margins recurved in lower ½-ª∕5 of the leaf length on one side, 2-stratose in upper part.

Laminal cells

In upper and central part isodiametric, not or slightly sinuose, (7)8-9 µm long, basal cells rectangular to oblong, usually esinuose, (15)30-50 × 8-10(12) µm.

Perichaetial leaves

Elliptical to ovate-lanceolate, 3-3.9(4.2) × (0.6)0.8- 1.0 mm.

Urn

Oblong-cylindrical, 0.7-0.9(1.2) × 0.5-0.7 mm, red-brown to orange-brown.

Exothecial cells

Predominantly oblong, mixed with groups of short rectangular or isodiametric cells, stomata absent or 1(2) rudimentary.

FIG. 6. — Distribution of Schistidium brunnescens Limpr. (★) and Schistidium convergens J.Guerra & M.J.Cano (●) in the Baetic System.

Peristome teeth

300-450 µm long, entire or with few to several perforations in upper part, not arranged in parallel lines, orange-red to orange-brown.