Growth Form: It is an epiphytic fern with a rhizome (horizontal stem) that is thick and fleshy with many scales, giving it a woolly appearance. The scales are dark brown and narrowed gradually to the tip.
Foliage: Its simple, lobed fronds (leaves) develop as 2 distinct types, nest and foliage fronds. The nest fronds are sessile, 40 by 30 cm, sterile, long-persisting, capture debris as humus for the plant, and protect the rhizome from exposure to sunlight and wind. The foliage fronds are stalked, 130 by 40 cm, fertile, lobed almost to the midribs, deciduous, drooping, and bear sori when mature. The blades split from the midrib when a foliage frond is old or experiences harsh external conditions.