Plagiothecium laetum var. hercinicum G. J. Wolski 2025, comb. nov.

Plagiothecium laetum var. hercinicum (Jur. ex Grav.) G. J. Wolski comb. nov. ≡ Plagiothecium denticulatum var. hercynicum Jur. ex Grav., Bulletin de la Société Botanique de Belgique 13: 430. 1874. Type: Belgium, Loutte-Saint-Pierre, sur les rochers ombragés et au pied des arbres dans les bois humides. Lectotype (designated here): Belgium, Loutte-Saint-Pierre, rochers ombragés, Oct. 1872, F. Gravet, C-M- 9387! Description. Plants medium-sized, yellowish to yellowish golden; stems 1.5–2.0 cm long; leaves complanate, asymmetrical, lanceolate, concave, not curved towards the ground, 2.0–2.4 × 0.7–1.0 mm (Fig. 11 B); margin incurved; the apex acuminate, denticulate by 2–3 teeth; cells linear-vermicular, 120–170 × 6–10 μm at midleaf (Fig. 11 E), cell areolation tight; decurrencies of 2–3 rows of rectangular, quadrate cells; capsule straight. Distribution. Europe (Belgium), but the range of this taxon still requires research.