Blechnum chambersii Tindale

Lamina flaccid, slightly paler beneath, glabrous. Main rhachis of the fertile fronds dull and mostly pale stramineous. Basal frond-segments reduced to auricles. Middle sterile frond-segments usually 1.2–4.5 cm long. Plants up to 60 cm high. Illawarra ranges. RF; in caves near waterfalls