Bird’s Nest Fern grows epiphytically on the trunks of trees in the forests of tropical Asia and Polynesia. The undivided, which may be more than 1 m (39 in) long, are arranged to form a kind of funnel or nest (Latin nidus means nest). Thir< enables it to catch humus and rainwater and direct them straight to the . The sori are clustered on the underside along the lateral veins, appearing to the casual glance like brownish-black parallel stripes.
This fern does well indoors. It requires a temperature of 20°-25°C (68°-77°F); the winter temperature should not fall below 18°C (64°F). Direct sunlight is harmful. Suitableis a mixture of mould, peat and sand, with a pH of 5. Water liberally and mist regularly to maintain at a level of at least 60 per cent. Propagate by spores. Thev will soon germinate at a temperature of 22°C (72° F). Asplenium is very attractive if grown on an epiphyte stump in imitation of its natural habitat.