Bryum cellulare Hooker in C. F. Schwagrichen, Sp. Musc. Frond. Suppl. 3(1,1): plate 214, fig. a. 1827

Plants pale pink-green. Stems0.5-1 cm, weakly julaceous, innovations many; rhizoids few on proximal stem. Leaves crowded, imbricate when dry, erect when moist, narrowly to broadly ovate, flat or weakly concave, 0.4-1(-2.5) mm; base not decurrent, pink; margins plane or recurved proximally, 1-stratose, limbidium absent or rarely 1-stratose proximally; apex acute; costa reaching apex to very short-excurrent; proximal laminal cells long-rectangular, (60-)80-100 × 18-24 µm, 4-5:1, sometimes bulging, walls thin; distal cells elongate hexagonal, 30-70 × 16-22 µm, 2-4:1, walls thin. Specialized asexual reproduction absent. Sexual condition dioicous. [Seta thick, (1-)2-3 cm, flexuose to twisted. Capsule inclined to nutant, 2-4 mm; hypophysis strongly differentiated, elongate; operculum apiculate; peristome well developed; exostome pale yellow or tan proximally, teeth lanceolate, long; endostome hyaline to pale yellow, not adherent to exostome, segments present, sometimes longer than exostome, cilia usually absent, occasionally 1 or 2. Spores 20-28 µm, papillose, yellow-brown].

Damp to seepy rock; low elevations (10 m); Fla., N.C.; Mexico; West Indies; Central America; South America; se Asia (including Indonesia); Africa; Pacific Islands (New Guinea); Australia.

Plagiobryoides cellularis is a widespread pantropical species. The North American material is very poor, consisting of a few small sterile shoots from two sites: on rocks near the sea on the Florida Keys and wet rock in North Carolina.