in botany; a genus of plants belonging to the class of cryptogamia, and order of frutes. The parts of fructification are solitary, and terminated by a style like a brittle, on the very edge of the leaf. There are 13 species; of which two are natives of Britain, the pixidiferum and tunbrigense.

1. Pixidiferum, or cup-trichomanes, has sub-bipinnate leaves, the pinnae being alternate, clove-lobed, and linear. It is found among stones in wet grounds in England.

2. Tunbrigense, or Tunbridge trichomanes, has pinnate leaves, the pinnae being oblong, dichotomous, decurrent, and dentated. It is found in the fissures of moist rocks in Wales, and in many rocky places in Scotland.