Schistidium convergens J.Guerra & M.J.Cano

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 : 64

8. Schistidium convergens J.Guerra & M.J.Cano

( Fig. 16)

Nova Hedwigia 109: 72 (2019).

HABITAT. — Exposed and sunny rocks (gneiss, peridotites and mica schists), from 965 to 2520 m. Distribution: Figure 6. The species is known from northern Africa and southern Spain (Granada and Málaga provinces).

DESCRIPTION

Plants

Small to medium-sized, 1-3 cm long, forming small tufts, olivaceous to brownish.

Leaves

Straight, erect, imbricate, occasionally curved, ovate to triangular-ovate, acute, 1.5-2.2 × 0.3-0.4 mm.

Hair-point

Usually present, cylindrical, straight, not decurrent, slightly spinulose, with short, erect to erect-patent spinulae, 0-250(300) µm long.

Lamina

Smooth, slightly papillose at the apex, 1-stratose below, in central and upper part varying from 1-stratose to 2-stratose in spots and strips, to irregularly 2-3-stratose, margins recurved throughout, reaching apex on both sides, rarely plane on one side, 1- to 2-stratose in upper and central part.

Laminal cells

Rounded, ovate or elliptical above, sometimes sinuose, in central part oblong and distinctly sinuose, (3.5)4-8 × 4-5(8) µm, basal cells rectangular, esinuose, 18-45(50) × 5-7 µm.

Perichaetial leaves

Ovate-elliptical, markedly narrowed above the middle, 2.2- 2.3 × 0.5-0.6 mm.

Urn

Oblong-cylindrical, slightly urceolate with age, 1.0-1.2(1.3) × 0.6-0.7 mm, brown to red-brown.

Exothecial cells

In upper and central part irregular, isodiametric, quadrate to short rectangular, sometimes oblate, stomata 2-4(5) per urn.

Peristome teeth

245-345 µm long, from entire to perforate with 1-2 narrow slits along median line in upper part, brown to orange-brown.