Polystichum richardii

{{Short description|Species of fern}}

{{Speciesbox

| image = Polystichum neozelandicum ssp. zerophyllum Tawa WT 01.jpg

| genus = Polystichum

| species = richardii

| authority = J.Sm.

| synonyms =

}}

Polystichum richardii, commonly known as the common shield fern, or pikopiko is a fern found in New Zealand.

The common shield fern is found in dry places from the coast to lowland forest areas. The size of the fronds can be up to 50 by 25 centimetres.{{cite web|title=Hard or common Shield Fern|url=http://www.taranakiplants.net.nz/natives/lowland/pol_richardii.html|publisher=Taranaki Regional Council|accessdate=10 November 2012}}

Young fronds from the fern were traditionally eaten by the Māori people.{{cite web|title=Maori uses: Food plants, Ferns|url=http://web.auckland.ac.nz/uoa/science/about/departments/sbs/newzealandplants/maoriuses/food/ferns/table-ferns.cfm|publisher=The University of Auckland|accessdate=10 November 2012|archive-url=https://web.archive.org/web/20130208154918/http://web.auckland.ac.nz/uoa/science/about/departments/sbs/newzealandplants/maoriuses/food/ferns/table-ferns.cfm|archive-date=8 February 2013|url-status=dead}}