Anyway, there are 130,000 bryophyte records from Carms and Pembs in my dataset, 1900 of which have Tarmac as substrate. The following lists the 81 species that I have recorded at least once on Tarmac in SW Wales, plus the number of records of that species. Rather few species are regular and the 'tail' of one-offs is very long.
| Bryum argenteum | 306 |
| Bryum dichotomum | 298 |
| Didymodon nicholsonii | 253 |
| Ceratodon purpureus | 116 |
| Cratoneuron filicinum | 93 |
| Bryum capillare var. capillare | 85 |
| Barbula unguiculata | 77 |
| Syntrichia intermedia | 72 |
| Syntrichia latifolia | 69 |
| Didymodon insulanus | 63 |
| Syntrichia ruralis | 56 |
| Brachythecium mildeanum | 29 |
| Leptodictyum riparium | 29 |
| Calliergonella cuspidata | 25 |
| Funaria hygrometrica | 22 |
| Didymodon luridus | 20 |
| Orthotrichum diaphanum | 20 |
| Brachythecium plumosum | 19 |
| Didymodon sinuosus | 19 |
| Schistidium crassipilum | 19 |
| Brachythecium rutabulum | 17 |
| Tortula truncata | 16 |
| Syntrichia ruraliformis | 13 |
| Brachythecium albicans | 12 |
| Rhynchostegium riparioides | 11 |
| Cinclidotus fontinaloides | 9 |
| Dialytrichia mucronata | 9 |
| Pseudocrossidium hornschuchianum | 8 |
| Syntrichia papillosa | 8 |
| Barbula convoluta var. commutata | 7 |
| Bryum ruderale | 7 |
| Philonotis fontana | 7 |
| Scleropodium cespitans | 7 |
| Tortula muralis var. muralis | 7 |
| Barbula convoluta var. convoluta | 6 |
| Pohlia wahlenbergii var. wahlenbergii | 6 |
| Amblystegium serpens var. serpens | 5 |
| Didymodon rigidulus | 5 |
| Grimmia pulvinata var. pulvinata | 5 |
| Schistidium apocarpum s.s. | 5 |
| Bryoerythrophyllum recurvirostrum | 4 |
| Bryum capillare | 4 |
| Campylopus introflexus | 4 |
| Didymodon fallax | 4 |
| Encalypta streptocarpa | 4 |
| Eurhynchium hians | 4 |
| Hypnum cupressiforme | 4 |
| Orthotrichum anomalum | 4 |
| Orthotrichum cupulatum var. cupulatum | 4 |
| Plagiomnium rostratum | 4 |
| Brachythecium rivulare | 3 |
| Plagiomnium undulatum | 3 |
| Schistidium apocarpum | 3 |
| Bryum rubens | 2 |
| Homalothecium sericeum | 2 |
| Hypnum lindbergii | 2 |
| Leskea polycarpa | 2 |
| Rhizomnium punctatum | 2 |
| Rhytidiadelphus squarrosus | 2 |
| Scorpiurium circinatum | 2 |
| Syntrichia virescens | 2 |
| Tortella nitida | 2 |
| Amblystegium tenax | 1 |
| Barbula convoluta | 1 |
| Bryum pseudotriquetrum s.l. | 1 |
| Dichodontium sp. | 1 |
| Didymodon vinealis | 1 |
| Homalothecium lutescens | 1 |
| Hygrohypnum luridum var. luridum | 1 |
| Hypnum lacunosum var. lacunosum | 1 |
| Orthotrichum cupulatum | 1 |
| Plagiomnium affine | 1 |
| Plagiomnium cuspidatum | 1 |
| Rhynchostegium confertum | 1 |
| Rhynchostegium murale | 1 |
| Rhytidiadelphus triquetrus | 1 |
| Schistidium elegantulum | 1 |
| Schistidium rivulare | 1 |
| Syntrichia laevipila var. laevipila | 1 |
| Syntrichia laevipila var. laevipilaeformis | 1 |
| Trichostomum crispulum | 1 |
