Bryum klinggraeffii Schimper in H. E. M. von Klinggraff, Höh. Crypt. Preuss., 81. 1858

Plants small, green to yellow-green. Stems 0.4-2(-3) cm; rhizoids pale tan to brown. Leaves loosely set, ovate-lanceolate, weakly concave, 0.4-1.5(-2) mm; base not decurrent; margins plane to weakly revolute proximally, serrulate distally, limbidium absent; apex acute to acuminate; costa short-excurrent, awn slender; alar cells similar to adjacent juxtacostal cells; proximal laminal cells gradually short-rectangular, (1-)2:1; medial and distal cells 40-60 × 10-14(-16) µm, 3-4:1. Specialized asexual reproduction by rhizoidal tubers, on long rhizoids in soil, red to crimson, irregularly spheric, 60-100(-120) µm, cells 20-30 µm, distinctly protuberant. Sexual condition dioicous. [Capsule inclined or nutant, 2-4 mm].

Damp disturbed soil in fields, agricultural settings; low to moderate elevations (0-800 m); Ont., Que.; Calif., Colo., Conn., Ill., Mo., N.Y.; s South America (Argentina); w Europe; Asia (China, India, Japan); Atlantic Islands (Iceland); Pacific Islands (New Zealand); Australia.

Gemmabryum klinggraeffii is distinguished by the relatively small, spheric, red to crimson tubers with distinctly protuberant cells and pale rhizoids. This species is probably introduced in the flora area.