Orthodontiaceae
Clades: Hedwigiales, Bryidae, Bryanae, Bryophyta, Plants.
Genera: Hymenodon, Leptotheca, Orthodontium, Orthodontopsis.
Botany
Moss; acrocarpous (not Hymenodon). Central strand present. Costa present Aut-, par-, or dioicous, rarely heteroicous. Seta present Capsule erect to horizontal, often furrowed, stomata phaneropore Annulus absent. Operculum present. Peristome reduced, cilia absent. Spores ± papillose Calyptra cucullate. Axillary propagules or rhizoidal gemmae