162 BAKERS NORTH YORKSHIRE. 



Trollms europceus, Drosera anglica, Stellaria nemorum, Epilo- 

 biiim angusiifoliuvi, Ribes alpimim, Myrrhis odorata, Ci-epis 

 paludosa, Vacciniiim Oxycocais, Pyrola rotundifolia, P. media, 

 P. minor, Myosotis sylvatica, Priimila farinosa, Rumex aquaticns, 

 Evipetrum nigrum, Listera cordata, Scirpus pauciflorics, Polypo- 

 dium Phegopteris, Lycopodium selaginoides, L. Selago. 



For the Flowering Plants and Ferns this gives a proportion 

 of about one-twelfth to the Montane element in our flora as 

 tested by number of species. If we include the Mosses in the 

 calculation the proportion is doubled, and we have about 220 

 Montane species out of a total flora of 1300 species, as will be 

 shewn in detail hereafter. As we ascend from the low country 

 amongst the hills the number of species gradually diminishes, 

 the Montane species which are added never compensating in 

 number for the Ascending species which cease. According to 

 my present notes respecting the vertical range of our indigenous 

 Flowering Plants and Ferns we have out of 100 species, at the 

 coast level arid below 100 yards 86, at 200 yards 64, at 300 yards 

 50, at 400 yards 37, at 500 yards 27, at 600 yards 17, at 700 yards 

 II, and at 800 yards 7. But in considering this proportion in 

 connection with climate we must be careful to remember that, as 

 we have already seen, we have as we ascend step by step, not 

 only lower temperatures, but also a more restricted area of 

 surface and a more restricted range of situation. A large pro- 

 portion of the species, as their localities beyond our limits 

 indicate, are not prevented by causes connected with temperature 

 from ascending to levels much higher than we anywhere possess 

 them. This applies more especially to those which ascend into 

 the two upper zones. The following lists contain a selection of 

 species arranged according to their ascending limits. I have 

 given them in leaps of 100 yards, twelve to each gradation. 



100 Yards.- — Thalictriim flavum, Reseda iutea, Bryonia dioica, 

 Scleranthus ati?iuiis, Convolvulus arvensis, C. sepium, Gentiana 

 Pneumonanthe, Lycopus europceus, Scrophtilaria aquatica, Nepeta 

 Cataria, Ballota nigra, Hordeum pratense. 



