Blechnum ambiguum (C.Presl) Kaulf. ex C.Chr. APNI*
Description: Rhizome short- to medium-creeping, scales of the rhizome and stipe base pale brown to red-brown, much longer than broad, lanceolate to ovate.
Fronds usually pendent, all similar, mostly pinnate, usually 30–50 cm long, pale green; pinnae becoming more coarsely toothed towards apices.
Sterile fronds with pinnae mostly 6–10 cm long, 15–25 mm wide, pinnae distinctly stalked, at least in the lower third of lamina, not markedly decreasing in size towards base, apices bluntly pointed; fertile fronds with pinnae usually 4–9 cm long, 3–10 mm wide and less than half as broad as the sterile pinnae.
Distribution and occurrence: Common on wet rocks, usually found in open forest, especially common in sandstone areas around Sydney.
NSW subdivisions: NC, CC, SC, CT, CWS
Other Australian states: Qld
Text by Peter G. Wilson
Taxon concept: T.C. Chambers & P.A. Farrant (1998)
APNI* Provides a link to the Australian Plant Name Index (hosted by the Australian National Botanic Gardens) for comprehensive bibliographic data
***The AVH map option provides a detailed interactive Australia wide distribution map drawn from collections held by all major Australian herbaria participating in the Australian Virtual Herbarium project.