Austroblechnum lanceolatum

Austroblechnum lanceolatum
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Division:	Polypodiophyta
Class:	Polypodiopsida
Order:	Polypodiales
Suborder:	Aspleniineae
Family:	Blechnaceae
Genus:	Austroblechnum
Species:	A. lanceolatum
Binomial name
	Austroblechnum lanceolatum; (R.Br.) Gasper & V.A.O.Dittrich
Synonyms
	Acrostichum nanum (Fée) Hook. ; Austroblechnum doodioides (Brack.) Gasper & V.A.O.Dittrich ; Blechnum chambersii Tind. ; Blechnum doodioides (Brack.) Brownlie ; Blechnum lanceolatum (R.Br.) Sturm ; Egonolfia nana Fée ; Lomaria doodioides Brack. ; Lomaria lanceolata (R.Br.) Spreng. ; Spicanta lanceolata (R.Br.) Kuntze ; Stegania lanceolata R.Br. ; Struthiopteris lanceolata (R.Br.) Ching ;

Austroblechnum lanceolatum, synonym Blechnum chambersii, is a species of fern within the family Blechnaceae, found in Australia, New Zealand, Samoa and Fiji. It is indigenous to Australia and New Zealand.

A. lanceolatum is commonly called lance water fern, and in New Zealand it is also referred to by its Māori names, nini and rereti.