Oceaniopteris gibba, the miniature tree fern (syn. Blechnum gibbum), is a tropical species of fern in the family Blechnaceae, native to Fiji. It has received the Royal Horticultural Society's Award of Garden Merit.It grows to 1–2 m (3.3–6.6 ft). With a vertical 'trunk' (actually a rhizome), it has bright green fronds. As it does not tolerate temperatures below 15 °C (59 °F), in temperate zones it must be cultivated under glass all year round. It is a suitable subject for a greenhouse or conservatory. ...