Cephalozia curvifolia Wood-rust

A widespread, dioicous or autoicous leafy liverwort that grows on rotting logs in deciduous and coniferous woodland, forming crimson mats. The 2 pincer-like teeth on the leaf are very long and curved. It is most commmon in the west of the country where it is a principal member of the bryophyte flora of decaying wood in Atlantic woodlands. It is very common and often abundant on decaying Sitka Spruce (Picea sitchensis) logs in the conifer plantations of West Glamorgan, particularly in Neath Port Talbot. It also grows on decaying hardwood logs in broad-leaved woodland in Gower and in temperate rainforest habitats in the uper Vale of Neath. Sporophytes are frequent.

Note that this species was formerly and better known as Nowellia curvifolia.