Parablechnum ambiguum

{{Short description|Species of fern}}

{{Speciesbox

| image = Waterfall plant Elvina Bay Ku-ring-gai Chase.jpg

| image_caption = Below a waterfall near Elvina Bay, Ku-ring-gai Chase National Park, Australia

| taxon = Parablechnum ambiguum

| authority = (Kaulf. ex C.Presl) C.Presl

| synonyms =

{{Species list

|Blechnopteris ambiguum|(Kaulf. ex C.Presl) Trevis.

|Blechnum ambiguum|Kaulf. ex C.Presl

|Blechnum procerum var. blechnoides|Luerss.

|Doodia caudata var.lomarina|F.Muell.

|Lomaria ambigua|(Kaulf. ex C.Presl) Fée

|Lomaria procera var. blechnoides|(Luerss.) Wawra

|Lomaria scabra|Kaulf.ex Sieber

|Orthogramma laevigata|C.Presl

|Parablechnum procerum var. acuminata|C.Presl

|Spicanta laevigata|(C.Presl) Kuntze

}}

| synonyms_ref =

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Parablechnum ambiguum, synonym Blechnum ambiguum, is a species of fern in the family Blechnaceae.{{cite web |title=Blechnum ambiguum, PlantNET - NSW Flora Online, Retrieved June 23, 2011|url=http://plantnet.rbgsyd.nsw.gov.au/cgi-bin/NSWfl.pl?page=nswfl&lvl=sp&name=Blechnum~ambiguum}} growing on wet rocks in eastern Australia, often seen near waterfalls. It is common around Sydney.Les Robinson - Field Guide to the Native Plants of Sydney, {{ISBN|978-0-7318-1211-0}} page 307