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Ferns:

FERNS     -    ESSEX CHECKLIST    further details available for those in blue

 current names (2008 checklist) former names Vc18 Vc19     Monads - post 1930
  (extinct red)            since lost (X)
Adiantum capillus-veneris   18   0                     3
Asplenium adiantum-nigrum   18 19                 63
Asplenium ruta-muraria   18 19  
Asplenium trichomanes ssp. quadrivalens   18         19  
Athyrium filix-femina   18  19                 72
Azolla filiculoides   18 19  
Blechnum spicant   18 19                 29
Botrychium lunaria   18 ? 19                  0
Ceterach officinarum   18 19                 2 [7 now gone]
Cystopteris alpina   18  0                  0
Cystopteris fragilis   18  0                  1
Dryopteris affinis agg. [definition and I.D.]        
Dryopteris affinis s.s.  D. affinis subsp. affinis 18 19                 12
Dryopteris affinis s.s. x filix-mas [D. x complexa]   18   ?                      2
Dryopteris borreri  D. pseudomas, D. affinis subsp. borreri 18 19                 29
Dryopteris borreri x felix-mas [D.x crinita]   18 19                  4
Dryopteris carthusiana   18 19                 92
Dryopteris carthusiana x dilatata [D. x deweveri]   18  0  
Dryopteris dilatata   18 19  
Dryopteris filix-mas   18 19  
Gymnocarpium dryopteris   18 19                  1
Gymnocarpium robertianum    0 19                  1
Matteuccia struthiopteris   18  0                  1
Onoclea sensibilis   18  0                  2
Ophioglossum vulgatum   18 19                 69
Oreopteris limbosperma Thelypteris limbosperma 18 19                  2
Osmunda regalis   18 19                  5 [ 6 now gone]
Phyllitis scolopendrium   18 19  
Pilularia globulifera   18  0                  0
Polypodium interjectum   18 19  
Polypodium vulgare   18 19  
Polypodium x mantoniae   18 19                   9
Polystichum aculeatum   18 19                 34
Polystichum aculeatum x setiferum [P. bicknellii]   18  0  
Polystichum setiferum   18 19                 70
Pterideum acquilinum   18 19  
Pteris cretica     19                  1
Thelypteris palustris   18  0                  3  [8 now gone]