Variety: denticulata Sw.
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Special colloquium on #ferns at the extreme: the case of Ophioglossaceae! Going to be a great session at #Botany2022
A great day doing a comprehensive Asplenium septentrionale count together with @NatResWales staff. Some positive site actions have already been done, and a good discussion on a management plan to look after this very special site. @FernBPS @fossilplants #FernFriday @cofnod3