BSBI Maps Scheme

Hectad map of Polystichum aculeatum (Hard Shield-fern) in GB and Ireland

Click on the links below to display records by date range:
-1930 (238 hectads)
1930-1969 (559 hectads)
1970-1986 (863 hectads)
1987-1999 (1742 hectads)
2000-2009 (896 hectads)
2010- (257 hectads)
All (Most recent on top) (2119 hectads)
All (Oldest on top) (2119 hectads)
NB: These maps are updated daily from live data sets and are checked and corrected retrospectively. They are useful for showing progress with recording and informing viewers about new finds, but they may also contain many temporary errors, especially in grid references and the names of species that are easily mistyped. For checked and standardised maps of species, always refer to publications such as the New Atlas of the British & Irish Flora rather than to online databases.
TIP: If your browser does not display the entire map without scrolling, try switching to Full-screen mode by pressing the F11 key. Pressing F11 again will return you to the normal browser layout.