Calonectria pteridis

{{Short description|Species of fungus}}

{{Speciesbox

| taxon = Calonectria pteridis

| authority = Crous, M.J.Wingf. & Alfenas (1993)

| synonyms_ref =

| synonyms = *Cylindrocladium pteridis {{small|F.A.Wolf (1926)}}

}}

Calonectria pteridis is a fungal plant pathogen. It is native to North America. It lives on the leaves of the Polystichum adiantiforme, Dryopteris normalis and of Nephrolepis exaltata plants,{{Cite web|title=Species Fungorum - Cylindrocladium ptederis|url=http://www.speciesfungorum.org/Names/NamesRecord.asp?RecordID=275533|access-date=2022-02-04|website=www.speciesfungorum.org}} among others.{{Cite web |last=Chitambar |first=John |date=2016-06-29 |title=Calonectria pteridis Crous, M. J. Wingf. & Alfenas, 1993 |url=https://blogs.cdfa.ca.gov/Section3162/?p=2207 |access-date=2023-07-08 |website=Pest Rating Proposals and Final Ratings |language=en-US}} The name is synonymous with Cylindrocladium pteridis.