72 SCIENTIFIC SURVEY OF NOTTINGHAM AND DISTRICT 



Finally, on the eastern and south-eastern border of the county for the 

 southern two-thirds of its length the Keuper is succeeded by the lower 

 beds of the Lias, which attain their maximum development south of 

 Cotgrave and Cropwell Bishop. Two rather extensive outliers occur to 

 the west of the main mass of the Lias in the extreme south of the county. 



The botanical districts adopted, four in number, are as follows: 



District I 



This comprises the area formed by the outcrops of the Coal Measures 

 and Permian rocks on the western side of the county. It might seem at 

 first sight that two such apparently dissimilar formations should con- 

 stitute separate districts, but the area occupied by the Coal Measures is 

 so small and its noteworthy plants so few in number that to make of it a 

 separate district would be to ascribe to this formation an importance al- 

 together out of proportion to its merits. Indeed the Coal Measures can 

 scarcely claim to possess a distinctive flora at all: not a single species 

 appears to be confined to their outcrop, and the few conspicuous plants 

 that do occur are equally common elsewhere. On the other hand, the 

 Magnesium Limestone possesses a large number of characteristic species, 

 some of which are peculiar to it. Among these the following may be 

 mentioned, the species hitherto found only on this formation being in- 

 dicated by an asterisk. 



Ranunculus lenormandi Schultz. 

 *Helleborus viridis L. 

 *Aquilegia vulgaris L. 

 *Arabis hirsuta Scop. 



Reseda lutea L. 



Helianthemum chamaecistus Mill. 



Silene cucubalus Wib. 



Hypericum montanum L. 

 *Geranium sanguineum L. 



Trifolium medium L. 



Anthyllis vulneraria L. 



Geum rivale L. 



Parnassia palustris L. 

 *Ribes alpinum L. 



Hippuris vulgaris L. 

 *Bupleurum romndifolium L. 

 *Selinum carvifolia L. 



Galium mollugo L. 



Erigeron acre L. 



Inula squarrosa Bernh. 



Centaurea scabiosa L. 



Campanula trachelium L. 

 „ latifolia L. 



Anagallis tenella L. 



Blackstonia perfoliata Huds. 



Gentiana amarella L. 



* „ baltica Murb. 

 *Myosotis arvensis Hill, var. 



silvestris Schlech. 

 Lithospermum arvense L. 

 Verbascum thapsus L. 

 Lathraea squamaria L. 

 Origanum vulgare L. 

 Calamintha acinos Clair. 

 *Cephalanthera grandiflora Gray 

 Anacamptis pyramidalis Rich. 

 Orchis ustulata L. 

 Ophrys apifera Huds. 



* „ muscifera Huds. 

 Gymnadenia conopsea Br. 



*Potamogeton coloratus Horn. 

 *Eriophorum latifolium Hoppe. 

 *Carex digitata L. 

 „ pendula Huds. 



* „ fulva Host. 

 *Melica nutans L. 



„ uniflora Retz. 

 Hordeum europaeum All. 

 Taxus baccata L. 



