Stow-Cum-Quy Fen

{{Use dmy dates|date=April 2022}}

{{Infobox SSSI

|image= Lake on Stow cum Quy Fen - geograph.org.uk - 146746.jpg

|image_caption =

|name= Stow-Cum-Quy Fen

|aos= Cambridgeshire

|interest=Biological

|gridref={{gbmappingsmall| TL 514 627 }}

|area= 29.9 hectares

|notifydate= 1986

|map=[http://magic.defra.gov.uk/MagicMap.aspx?startTopic=Designations&activelayer=sssiIndex&query=HYPERLINK%3D%271002332%27 Magic Map]

}}

Stow-Cum-Quy Fen is a {{convert|29.9|hectare|acre|adj=on}} biological Site of Special Scientific Interest west of Lode in Cambridgeshire.{{cite web|url= https://designatedsites.naturalengland.org.uk/SiteDetail.aspx?SiteCode=S1002332&SiteName=QUY&countyCode=&responsiblePerson= |title=Designated Sites View: Stow-Cum-Quy Fen | series= Sites of Special Scientific Interest|publisher=Natural England|accessdate = 13 December 2016}}{{cite web|url= http://magic.defra.gov.uk/MagicMap.aspx?startTopic=Designations&activelayer=sssiIndex&query=HYPERLINK%3D%271002332%27|title=Map of Stow-Cum-Quy Fen|series= Sites of Special Scientific Interest|publisher=Natural England|accessdate= 13 December 2016}} Most of it is common land.{{cite web|url=http://www.sssi.naturalengland.org.uk/citation/citation_photo/1002332.pdf|title=Stow-Cum-Quy Fen citation|series=Sites of Special Scientific Interest|publisher=Natural England|accessdate=13 December 2016|archive-date=24 October 2012|archive-url=https://web.archive.org/web/20121024202451/http://www.sssi.naturalengland.org.uk/citation/citation_photo/1002332.pdf|url-status=dead}}

The site is calcareous loam pasture, with diverse flora and open pools which have rare aquatic plants. Grassland herbs include purging flax

and salad burnet, and there are aquatic plants such as unbranched bur-reed, mare's tail and bladderwort.

There is access to the site by footpaths from Lode and Horningsea.