Acaulon Moss

Description

Plants often look brown, are 1-2 mm tall, and seem to consist of a few concave upper leaves (up to 2 mm long) which clasp a capsule that is almost completely hidden amongst them. These upper leaves have plane margins that are bluntly toothed towards the rounded tip, and a nerve that is usually shortly excurrent. The lower leaves are much smaller than the upper leaves. The spherical capsules are common in winter, and borne on a seta that is little more than 0.1 mm long. A. muticum var. mediterraneum (A. mediterraneum) (Smith, p. 296) differs only in its spores.