5. Leucobryum glaucum (Hedw.) Aöngstr. in Fries 白发藓 bai-fa xian
Summa Veg. Scand. 1: 94. 1846. Dicranum glaucum Hedw., Spec. Musc. Frond. 135, 1801. Type. "In sylvis uliginosis, pinetis, ericetis, pratisque paludosis caepsitose vitam degit, totius Europae et Americae septemtrionalis nec non Jamaicae incola."
Plants often robust, up to 20 cm high, whitish to grayish green, in dense compact tufts or cushions. Stems erect, simple or branched; central strand absent. Leaves erect to erect-spreading or sometimes subsecund, 4–8 mm long, lanceolate to gradually narrowed to subtubulose apices from an oblong-ovate base, acute to apiculate or bluntly mucronate at the apex, dorsal side of leaf acumina smooth; margins entire, bordered by 2–3 rows of linear cells, basal laminae consisting of 5–9 rows of quadrate to rectangular cells; costa in cross section with 2(–3) layers of leucocysts on both sides of chlorocysts in the upper part of leaves, sometime 3(–4) layers of leucocysts on both sides of chlorocysts near leaf base. Dioicous. Setae slender, 2–3 cm long, reddish brown; capsules ovoid, 1.5–2.0 mm long, strongly inclined and curved, strumose; opercula long-rostrate; annuli none; peristome teeth the same as described under the genus.