Polystichum Cultivars - Variation in the British shield ferns. J. W. Dyce, R. Sykes & M. Rickard

The first edition of this guide was published by the British Pteridological Society in 2005, but has been out of print since about 2013. This is a reprint of the original edition with no alterations or corrections, but with an added colour section as a supplement.

Author: J. W. Dyce - edited and expanded by Robert Sykes and Martin Rickard. Where opinions have changed in specific areas, the editors have occasionally commented under a given photograph.