New Zealand Status: Endemic
Conservation Status: Not Threatened
Blechnum filiforme, also known as Thread Fern, is a creeping and climbing fern that develops in three stages, juvenile, climbing, and adult, each with its own distinct frond shape. Juvenile plants creep across the ground until they reach a tree trunk which they climb up and later develop larger sterile and fertile fronds. The adult shape has long graceful thread-like leaflets from which the plant gets its common name.
When sufficient height has been achieved, Blechnum filiforme produces specialist fertile fronds bearing spores. The spores are dispersed by wind.
Blechnum filiforme occurs in damp lowland forest.
© Geografpix Photography, Steve Reader