Geographical Distribution of Plants in Yorkshire. 215 



tentilla aurea, Geum rivale, Dryas octopetala, Actcea spicata, 

 Thalictrum minus, majus, Trollius europceus, Draba incana, 

 muralis, Thlaspi alpestre, Cochlearia officinalis, Cardamine im- 

 patiens, Turritis hirsuta, Geranium phceum, sylvaticum, san- 

 guineum, Hieracium paludosum, Hypochceris maculata, Carduus 

 heterophyllus, Senecio sarracenicus, Satyrium albidum, Ophrys 

 nidus avis, Cypripedium Calceolus, Salix myrsinites, herbacea, 

 reticulata ; Taxus baccata, Osmunda lunaria, Lycopodium sela- 

 ginoides, inundatum, alpinum; Asplenium viride, Scolopendrium 

 ceterach, Pteris crispa, Hymenophyllum tunbridgense, &c. 



The high range of hills called the Yorkshire Wolds, begin- 

 ning at the coast near Bridlington, is composed of chalk. This 

 formation extends by Driffield, forming a bow betwixt Beverley 

 and Pocklington to the Humber. In this part the Ericce are 

 not found. The only rare plants are a few common to lime- 

 stone, viz. Festuca pumilis, bromoides, Gentiana amarella (3, 

 Chlora perfoliata, Astragalus hypoglottis. Passing the Vale of 

 Pickering (lately rendered notorious by the fossil bones disco- 

 vered in the Kirkdale Cave), we come to the oolite, extending 

 from Scarborough, by Kirkby Moorside, Hemsley, to meet 

 the alluvium near Easingwold ; it then takes a turn to the east, 

 and passes Malton, and we find on it the following plants ; 

 Chara hispida, Jlexilis, Veronica montana, Utricularia minm, 

 Schcenus mariscus albus, Scirpus pauciflortis, articularis, sylva- 

 ticus, Bromus pinnatus, Arundo epigejos, calamagrostis, Lolium 

 arvense, Elymus europceus, Galium tricorne, Potamogeton gra- 

 mineum, Viola hirta, lulea, Gentiana pneumonanthe, Bupleu- 

 rum rotundifolium, Caucalis daucoides, Pimpinella magna, Li~ 

 num perenne, Drosera anglica, longijolia, Paris quadrifolia, 

 Pyrola rotundifolia, Potentilla verna, Geum rivale, Papaver 

 hybridum, Ranunculus Lingua, parviflorus, &c. 



The only district which I have not been able to examine is 

 the Alum-shale, rising on the coast, from Whitby to the Tees, 

 including the Vale of Esk. The small line of basalt found in 

 Yorkshire passes through the above. 



Plants found in the southern counties of England, which are 

 not in Yorkshire : 



Clematis vitalba. Campanula patula. 



Orobanche minor. Trachelium. 



Tarnarix gallica. 

 Northern plants, not found : 



Ligusticum scoticum. Aira levigata. 



Cerastium tetrandrum. Sagina maritima. 



Plants which appear to have readied their northern limits: 



BlltomiU unibellatus. Viscuin album. 



Plants 



