Polytrichum commune var. perigoniale (Michx.) Hampe

Plants in compact, rather dense tufts. Stems to 6 cm. Leaves densely imbricate and crowded, somewhat less sharply toothed than in var. commune; marginal cells of lamellae in section narrow, more shallowly grooved; peri-chaetial leaves conspicuous and ribbon-like, exceeding the foliage leaves, mostly hyaline, subentire, ending in a long, nearly smooth awn. Capsule short-rectangular to cubic.