A genus of handsome low-growing tree Ferns closely related to and resembling the Lomarias, from which, however, they may be distinguished by having the spore clusters in lines parallel with and usually contiguous to the median nerves. Amongst the kinds requiring greenhouse treatment are B. australe, from South Africa, and B. cartilagi-neum, from Australia. B. brasiliense and B. Lanceola, both from Tropical America, should be grown in the stove, and with them B. occidentale, a pretty species in which the young fronds are brightly tinted.