Plagiothecium denticulatum var. denticulatum (Hedw.) Schimp.

Plagiothecium denticulatum var. denticulatum (Hedw.) Schimp. View in CoL , Bryologia Europea 5: 190, 501, Tab. VIII. 1851.

≡ Hypnum denticulatum Hedw. , Species Muscorum Frondsorum 237. 1801 ≡ Stereodon denticulatus (Hedw.) Brid. , Bryologia Universa 2: 824. 1827 ≡ Pancovia denticulata (Hedw.) J. Kickx f. , Flore Cryptogamique des Flandres 1: 93. 1867. Lectotype (designated by Ireland 1969): Germany, Starke, G 000420240!

= Plagiothecium denticulatum var. bullulae Grout View in CoL , North American Musci Perfecti 450 1942. Lectotype (designated here): U. S. A., Idaho, Elmore Co., Boise National Forest, on soil and base of saplings by small water course above cemetery, 22 Sep. 1942, F. A. MacFadden, C-M- 9386! Isolectotypes: MO- 406576, NY 505676, NY 507145.

= Plagiothecium sylvaticum var. rupestre Warnst. ex Grav. , Bulletin de la Société Royale de Botanique de Belgique 19: 31. 1880. Lectotype (designated here): Germany, Bavar. Australis, ad rupes silic. umbros. montium editiorum Silvae Gabretae, parietes verticals investiens, ca. 800–1000 m, Aug 1879, sub “ P. silvaticum var. rupestre Progel ”, Progel, PC 0132568! Isolectotypes: Germany Baiern, Waldmünchen am Böhmerwald, auf Gneissfelsen im Juni, Progel, PC 0132569! syn. nov.

Description.

Plants medium-sized, light to dark green, with metallic luster; stems 2–5 cm long; leaves complanate, more julaceous in lower part of stem, concave, ovate, asymmetrical, with two rounded sides, rounded asymmetric, 1.5–3.0 × 0.5–2.0 mm (Fig. 1 A View Figure 1 ); the apex acute to acuminate; margins denticulate near the apex; laminal cells 80–130 × 10–14 μm at midleaf (Fig. 1 D View Figure 1 ), cell areolation quite loose; decurrencies well developed, consisting of 4–5 rows of spherical, inflated cells; capsule inclined.

Distribution.

Asia (Azerbeijan, Bangladesh, China, Democratic People’s Republic of Korea, Iraq, India, Islamic Republic of Iran, Japan, Kazakhstan, Kyrgystan, Mongolia, Nepal, Pakistan, Republic of Korea, Russian Federation); Europe ( Albania, Andorra, Armenia, Austria, Belarus, Belgium, Bosnia and Herzegovina, Bulgaria, Croatia, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Kosovo, Latvia, Lichtenstein, Lithuania, Luxembourg, Montenegro, Netherlands, North Macedonia, Norway, Poland, Portugal, Romania); North America ( Canada, U. S. A.).