The unclued lights are ferns: RUSTY-BACK (26/5A), WALL RUE (48/7A), MAIDENHAIR (1D/11), OSMUNDA (18), BIRD’S-NEST (20/45) and POLYPODY (24). PTERIDOMANIA (diagonally from 10) could have induced this puzzle and was to be shaded.
Title: cf. Adder’s-tongue.
First prize Lyndsay Ashley, Shoreham-by-Sea, West Sussex
Runners-up Peter Taylor-Mansfield, Worcester; Rhiannon Hales, Ilfracombe, Devon