The following is a list of vascular plants, bryophytes and lichens which were regarded as rare species by the authors of British Plant Communities, together with the communities in which they occur.
Vascular plants
Man orchid (Aceras anthropophorum) CG2, CG3, CG5
Baneberry (Actaea spicata) W9
Bristle bent (Agrostis curtisii) H2, H3, H4, H5, H6
Ground-pine (Ajuga chamaepitys) CG2, OV15
The lady's-mantle Alchemilla filicaulis ssp. filicaulis CG10
The lady's-mantle Alchemilla acutiloba MG3
The lady's-mantle Alchemilla glomerulans MG3
The lady's-mantle Alchemilla monticola MG3
The lady's-mantle Alchemilla subcrenata MG3
The lady's-mantle Alchemilla wichurae MG3, CG10
Babington's leek (Allium ampeloprasum var. babingtonii) OV6
Chives (Allium schoenoprasum) H6, H7, MC5
Three-cornered garlic (Allium triquetrum) OV24
Bog-rosemary (Andromeda polifolia) M2
Annual vernal-grass (Anthoxanthum aristatum) OV1
Loose silky-bent (Apera spica-venti) OV5
Bristol rock-cress (Arabis stricta) CG1
Field wormwood (Artemisia campestris) CG7
Goldilocks aster (Aster linosyris) CG1
Purple milk-vetch (Astragalus danicus) H7, CG2, CG3, CG4, CG5, CG7, SD11, SD12, MC10, MC5 Wild cabbage (Brassica oleracea) OV41, MC4, MC5 Lesser quaking-grass (Briza minor) OV1, OV2, OV6 Lesser hairy brome (Bromus benekenii) W9 Great pignut (Bunium bulbocastanum) CG2 Small hare's-ear (Bupleurum baldense) CG1 European box (Buxus sempervirens) W13 Narrow small-reed (Calamagrostis stricta) S1 Narrow-leaved bittercress (Cardamine impatiens) W8 Fibrous tussock-sedge (Carex appropinquata) W3 Hair sedge (Carex capillaris) CG10 String sedge (Carex chordorrhiza) M4 Lesser tussock-sedge (Carex diandra) W3 Elongated sedge (Carex elongata) W2 Rare spring-sedge (Carex ericetorum) CG2, CG5, CG7 Dwarf sedge (Carex humilis) CG1, CG2, CG3 Tall bog-sedge (Carex magellanica) M2 Soft-leaved sedge (Carex montana) H4, CG2, CG10 Rock sedge (Carex rupestris) CG10 Common centaury (Centaurium erythraea var. capitatum) MC5 Dwarf mouse-ear (Cerastium pumilum) CG1, CG2 Tuberous thistle (Cirsium tuberosum) MG5, CG2 Coralroot orchid (Corallorrhiza trifida) W3 Grey hair-grass (Corynephorus canescens) SD11 Sea-kale (Crambe maritima) SD1 Northern hawk's-beard (Crepis mollis) W9 Mezereon (Daphne mezereum) W8 Yellow whitlowgrass (Draba aizoides) CG1, OV41 Hoary whitlowgrass (Draba incana) CG10 Crested buckler-fern (Dryopteris cristata) W2 The fern Dryopteris × uliginosa, the hybrid of crested buckler-fern and narrow buckler-fern (D. carthusiana) W2 Dorset heath (Erica ciliaris) H3, H4 Cornish heath (Erica vagans) H4, H5, H6, H7 Musk stork's-bill (Erodium moschatum) OV14 Portland spurge (Euphorbia portlandica) H7, CG1 The eyebright Euphrasia pseudokerneri CG2 Wood fescue (Festuca altissima) W8 Snake's-head fritillary (Fritillaria meleagris) MG4 Tall ramping-fumitory (Fumaria bastardii) OV6, OV11, OV13 Yellow star-of-Bethlehem (Gagea lutea) W9 Wall bedstraw (Galium parisiense) CG7 Slender bedstraw (Galium pumilum) CG2, CG5 Limestone bedstraw (Galium sterneri) CG2, CG10 Early gentian (Gentianella anglica) CG1, CG2 Chiltern gentian (Gentianella germanica) CG2 Hairy greenweed (Genista pilosa)) H2, H7, MC5 Bog orchid (Hammarbya paludosa) M1 White rock-rose (Helianthemum apenninum) CG1 Hoary rock-rose (Helianthemum canum) CG1 The hybrid between white and hoary rock-roses Helianthemum × sulfureum CG1 Musk orchid (Herminium monorchis) CG2, CG4, CG5 Fringed rupturewort (Herniaria ciliolata) H7, MC5 Lizard orchid (Himantoglossum hircinum) CG7 Hutchinsia (Hornungia petraea) CG7, OV39 Spotted cat's-ear (Hypochoeris maculata) CG1, CG2, CG3 Wild candytuft (Iberis amara) CG2 Land quillwort (Isoetes histrix) H7 Dwarf rush (Juncus capitatus) H6 Somerset hair-grass (Koeleria vallesiana) CG1 Rock sea-lavender (Limonium recurvum) MC1 Perennial flax (Linum perenne subsp. anglicum) CG2, CG3 Hairy bird's-foot trefoil (Lotus hispidus) MC5 Tufted loosestrife (Lysimachia thyrsiflora) W1, W3, M4