A HISTORY OF CORNWALL Plants occurring in Cornwall with a lower Watsonian comital num- ber than ten are : Thalictrum majus, Mathiola incana, Polycarpon tetraphyl- lum, Genista pilosa, Medicago falcata, Lotus angustissimus, L. bispidus, Rubus nemoralis, R. leucandrus, R. ramosus, R. Bar teams, R. Barren, R. oigoclados, R. botryeros (Lejeunei), R. thyrsiger, R. plintbostylus, Pyrus rotundifolia, Eryngium campestre, Hypochceris maculata, Erica ciliaris, Microcala Jiliformis, Gentiana baltica, Linaria supina, Sibtborpia europcea, Orobanche ametbystea, 0. Picridis, Mentha pubescens, Melittis Melissophyllum, Illecebrum verticillatum, Herniaria glabra, Polygonum maritimum, Hippophce rbamnoides, Asparagus officinalis, Scilla autumnalis, Juncus tenuis, Arum italicum, Cyperus longus, Scirpus carinatus, S. triqueter, Fibicbia umbellata, Briza minor, Adiantum Capillus-Veneris, Char a canescens, Nitella gracilis. Until Devon has been more thoroughly worked, a comparison of the floras of the two westernmost counties can only be approximately correct. Although many good lists have been compiled since the publication of the Botanist's Guide, nearly one hundred years ago, large tracts still need sys- tematic attention. Investigations in Devon show that its more moun- tainous character and its greater range of sylvan and moorland features notwithstanding, its flora is not separated from that of Cornwall by any sharp line of demarcation. Neither of the counties is rich in those remnants of a northern flora to which H. C. Watson gave the name ' Highland ' and Professor Edward Forbes ' Alpine,' while both have their share of Watson's ' Atlantic ' and Forbes' ' Asturian ' and ' Ar- morican ' types. The total number of plants reported for Cornwall and for which records for Devon are still wanting is 129, but for a satisfactory comparison of the two floras this number must be greatly reduced. Taking no count of species printed in italics in the London Catalogue, and excluding those which though natives of other parts of Great Britain have found their way into Cornish lists on the strength of a stray record or as recognized aliens or strays from cultivation, Cornwall may claim sixty plants not yet known to occur" in the neigh- bouring county. Some of these have been already mentioned when dealing with plants restricted to Cornwall. Of the remainder the more important are : Thalictrum Jiexuosum, T. majus, Silene cornea, Arenaria verna var. Gerardi, Genista pilosa, Galium syhestre, Aster salignus, Filago apiculata, F. spathulata, Hieracium rigidum, H. crocatum, Erica ciliaris^ Gentiana baltica, Mentha pubescens, Herniaria ciliata, Atrip lex littoralis, Euphorbia platypbyllos, Allium Schcenoprasum, A. sibiricum, Cyperus longus, Eleocharis uniglumis, Cladium Jamaicense, Chara polyacantba, C. baltica var. affinis. Among the 69 items by which Devon has Cornwall at a disadvantage are : Myosurus minimus, Fumaria Vaillantii, Nasturtium am- pbibium, Helianthemum Chamcecistus, H, polifolium, Dianthus deltoides, Hypericum hirsutum, Hippocrepis comosa, Potentilla verna, Eupleurum tenuis- simum, B. aristatum, Trinia glaberrima, Aster Linosyris, Artemisia maritima, Litbospermum purpureo-caeruleum, Teucrium Scordium, Pinguicula vulgaris, Utricularia intermedia, Hydrocharis Morsus-rance, Ma/axis paludosa, Orchis ustulata, Listera cordata, Epipactis media, Ophrys muscifera, Sagittaria sagitti- 52
