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NORTHUMBERLAND AND DURHAM.
47
| Saxifraga oppositifolium. | Juncus squarrosus. | |
| Oxalis acetosella. | triglumis. | |
| Chrysosplenium oppositifolium. | Carex stellulata. | |
| Galium saxatile. | rigida. | |
| Sedum rhodiola. | Anthoxanthum odoratum. | |
| Sausserea alpina. | Poa annua. | |
| Hieracium chrysanthum. | Festuca ovina. | |
| Campanula rotundifolia. | Aira flexuosa. | |
| Vaccinium myrtillus. | Allosorus crispus. | |
| vitis-idaea. | Lastrea dilatata. | |
| Euphrasia officinalis. | filix-mas. | |
| Thymus serpyllum. | Cystopteris fragilis. | |
| Rumex acetosa. | Lycopodium alpinum. | |
| Oxyria reniformis. | selaginoides. |
The following are the principal species which are conspicuously more frequent amongst the Lake hills than in the east, those marked with a star not being Northumberland, Durham, or North Yorkshire plants at all.
| Nymphaea alba. | Cotyledon umbilicus. | |
| Meconopsis cambrica. | Jasion montana. | |
| *Silene acaulis. | *Lobelia Dortmanna. | |
| *Alchemilla alpina. | Festuca sylvatica. | |
| *Impatiens noli-me-tangere. | *Salix herbacea. | |
| *Circaea alpina. | *Isoetes lacustris. | |
| *Saxifraga oppositifolia. | Allosorus crispus. | |
| Sedum rhodiola. | *Juncus filiformis. | |
| anglicum. | Hypericum androsaemum. | |
| purpureum. |
CHAPTER II.
CLIMATOLOGY, BY JOHN G. BAKER.
Zones of Altitude.—The difference in mean annual temperature between the equator and line of perpetual snow is about 55° Fahrenheit, which is a lowering of rather less than one degree of temperature to a degree of latitude. On the equator at sea-level
