Seta 3-5 mm, straight to some-what arcuate. Capsule when mature narrowly ovoid to nearly cylindric, 3-5 mm, dull brown to rusty-brown, upper face not strongly differentiated from lower face, slightly oblique to seta or nearly erect. Spores 12-13 µm.
1. Buxbaumia minakataeS.Okam. 筒蒴烟杆藓 tong shuo yan gan xian Bot. Mag. (Tokyo) 25: 30. f. 1. 1911. Type: Japan. Prov. Kii, Hiraigodani in Chikanomura, Nishimuro-gun, Dec. 1, 1908, K. Minakata s.n. Plants very small. Stems and leaves extremely reduced, often resting on green protonemata. Male plants tiny, leaves irregularly ovate, clam-shell-shaped; female plants slightly larger, less than 1.0 mm high. Leaves broadly ovate or ovate-lanceolate, thin and soft, hyaline, ciliate at margins; costa absent; leaf cells shortly rectangular or oblong-ovate. Sporophytes ca. 10 mm high. Setae reddish brown, often densely papillose, stout, 2.5–5.0 mm long, straight or slightly curved; capsules yellowish brown to brownish, oblong-ovoid, 3–5 mm × 1.5–2.0 mm, not flattened on the upper surface, dorsal and ventral sides not differentiated, inclined, necks not distinct; stomata superficial; mouths narrowed, ca. 1.0 mm in diameter; opercula bluntly conic, ca. 1.0 mm high; annuli weakly differentiated; exostome reduced, short; endostome white, membrane-like, much better developed, ca. 0.5 mm long, 16-plicate, pleated cone shaped, papillose. Calyptrae small, ca. 0.8 mm long, only covering the operculum, naked. Spores ca. 10–15 µm in diameter, finely papillose.
