taxonID	type	description	language	source
0399CF52FFDAFFF6D2E7FE11FB2AFEAD.taxon	materials_examined	Type: Russia, Khabarovsk Territory, North Sikhote-Alin, ca. 1 km westward of Tardoki-Yani Mt. Peak, N: 48 ° 53 ’ 16.9 ”, E: 138 ° 02 ’ 52.8 ”, 1940 m, on soil. Coll. A. V. Ermolenko # 7 - 4, 24. VIII. 2013 (Holotype MW 9112512, Isotype MHA).	en	Ignatov, M. S., Fedorova, A. V., Troitsky, A. V. (2019): A new Brachythecium (Brachytheciaceae Bryophyta) from the Russian Far East. Arctoa 28 (2): 222-225, DOI: 10.15298/arctoa.28.20, URL: https://doi.org/10.15298/arctoa.28.20
0399CF52FFDAFFF6D2E7FE11FB2AFEAD.taxon	diagnosis	Diagnosis. Differs from other species in combination of (1) robust pale-stramineous plants, weakly branched stems, terete foliate shoots; (2) leaves with ovate base, subpiliferous distally, strongly concave, crumply plicate; (3) margins minutely serrulate almost all around; (4) laminal cells 65 – 70 (– 90) × 7 – 10 µm, moderately thick-walled, porose; (5) alar cells wider, extending upwards.	en	Ignatov, M. S., Fedorova, A. V., Troitsky, A. V. (2019): A new Brachythecium (Brachytheciaceae Bryophyta) from the Russian Far East. Arctoa 28 (2): 222-225, DOI: 10.15298/arctoa.28.20, URL: https://doi.org/10.15298/arctoa.28.20
0399CF52FFDAFFF6D2E7FE11FB2AFEAD.taxon	description	Description. Plants large, light yellowish-green, glossy, soft, forming loose tufts; outermost proximal branch leaf in branch primordia in 12 o’clock position, abruptly acuminate and consistently squarrose; axillary hairs with one apical and two basal cells, 45 – 60 µm long. Stems to 8 cm long, simple, with few short branches or irregularly branched, terete-foliate. Leaves erect-spreading to spreading when dry, crumpled, erect-spreading to loosely appressed when moist, 2 – 3 × 1.0 – 1.3 mm, ovate to ovate-triangular, widest at 1 / 6 the leaf length, abruptly narrowed into long filiform acumen, strongly concave (forming deep plicae in slides); margins plane or narrowly recurved at base and at the constriction to acumen, weakly serrulate in upper 3 / 4, subentire below; costa single, weak, quickly narrowing upwards, extending to 1 / 2 – 3 / 4 the leaf length; median laminal cells linear, 65 – 70 (– 90) × 7 – 10 µm, slightly porose; basal laminal cells elongaterectangular, 60 – 75 × 15 – 20 µm, porose; alar group moderately delimited; alar cells in several submarginal rows, not extending to costa, short-rectangular, 35 – 50 × 25 – 30 µm, moderately thick-walled, slightly porose. Apparently dioicous. Gametangia and sporophytes unknown. Differentiation. Robust habit, crumply plicate leaves, and pattern of basal cell differentiation of B. amurense are similar to B. garovaglioides and, partly, also to B. complanatum. However, both these species have coarsely serrate leaves, and they belong to phylogenetically distant groups (Fig. 1). According to the obtained phylogeny, the closest to B. amurense are B. mildeanum (differs in entire leaf margins of rather narrowly triangular shape), B. laetum (differs in strongly plicate leaves and expand- ed group of opaque basal cells), and B. boreale (differs in medium-sized plants, rather short acumina, dense areolation throughout the leaf, except for a small group of enlarged cells in leaf corners).	en	Ignatov, M. S., Fedorova, A. V., Troitsky, A. V. (2019): A new Brachythecium (Brachytheciaceae Bryophyta) from the Russian Far East. Arctoa 28 (2): 222-225, DOI: 10.15298/arctoa.28.20, URL: https://doi.org/10.15298/arctoa.28.20
0399CF52FFDAFFF6D2E7FE11FB2AFEAD.taxon	biology_ecology	Ecology. The species was collected at 1940 m a. s. l., in alpine belt, on soil on moist open slope, with Philonotis fontana, Loeskypnum badium, Campylium stellatum, and Hylocomiastrum pyrenaicum. The finding of such large and conspicuous moss once again illustrates the poor knowledge of of high mountain diversity in Far Eastern region.	en	Ignatov, M. S., Fedorova, A. V., Troitsky, A. V. (2019): A new Brachythecium (Brachytheciaceae Bryophyta) from the Russian Far East. Arctoa 28 (2): 222-225, DOI: 10.15298/arctoa.28.20, URL: https://doi.org/10.15298/arctoa.28.20
