Mosses
Only one genus of sawflies is known to feed on mosses in Britain. The sawfly Nesoselandria morio feeds on the following genera.
Plagiomnium
Pseudobryum
Dicranum
Ceratodon
Hedwigia
Plagiothecium
Polytrichum
Ferns
The families Blasticotomidae, Heptamelidae, and the Tenthredinidae subfamilies Selandriinae and Trenthredininae have larvae that feed on various ferns. The Blasticotomidae and Heptamelidae mine the fronds whilst the others are free feeders.
Asplenium (Spleenworts)
Aneugmenus padi
Athyrium (Lady Ferns)
Blasticotoma filiceti, Heptamelus ochroleucus, Aneugmenus coronatus, Stromboceros delicatulus, Strongylogaster (macula, mixta), Tenthredo livida
Gymnocarpium (Oak Fern)
Stromboceros delicatulus
Blechnum (Hard-fern)
Heptamelus ochroleucus
Pteridium (Bracken)
Blasticotoma filiceti, Aneugmenus (fuerstenbergensis, padi, temporalis), Rhogogaster chlorosoma, Stromboceros delicatulus, Strongylogaster (filicis, macula, mixta, multifasciata, xanthocera), Tenthredo (balteata, colon, ferruginea, livida)
Dryopteris (Buckler-ferns)
Blasticotoma filiceti, Aneugmenus coronatus, Strongylogaster (multifasciata, xanthocera), Tenthredo (mioceras, ferruginea)
Polystichum (Shield-ferns)
Blasticotoma filiceti
Polypodium (Polypody)
Heptamelus ochroleucus, Stromboceros delicatulus
Horsetails
Only the Tenthredinidae genus Dolerus has larvae that feed on horsetails with the vast majority being on the wetland species.
Equisetum
Dolerus (aericeps, bimaculatus, eversmanni, germanicus, gessneri, gilvipes, junci, pratensis, pratorum, vestigialis, yukonensis)
Equisetum arvense (Field Horsetail)
Dolerus (aericeps, germanicus, pratorum)
Equisetum fluviatile (Water Horsetail)
Dolerus (junci, pratensis)
Equisetum palustre (Marsh Horsetail)
Dolerus (aericeps, eversmanni, germanicus, gessneri, junci, pratensis, vestigialis)
Equisetum pratense (Shady Horsetail)
Dolerus pratorum
Equisetum sylvaticum (Wood Horsetail)
Dolerus (gessneri, gilvipes, vestigialis)