BethanStagg's picture

Which polypody?

Observed: 28th January 2011 By: BethanStaggBethanStagg’s reputation in Plants

Found on a wall in Plymouth - much smaller than usual for a polypody (6cm) but could be due to location. Frond tip very short, which makes me think Western polypody, pinna tips pointed and lightly serrated margins

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RMWalls's picture


The two common spp are difficult to sort out from photos. The best character is to look for the dark row of indurated cells in P.vulgare. I cannot see these on this frond, hence P.interjectum is likely. However the sori are round and the frond outline could be P.vulgare.

R M Walls

BethanStagg's picture


Dear RM Wallis,
Thanks for useful comments. Are the indurated cells the row of light perforations running close to the margin? If so,I can see them on this specimen