NORTHUMBERLAND AND DURHAM. 61 



Stop upwards at 300 yards. — Cardamine amara, Sisymlrium 

 officinale^ Viola hirta, Hypericum perforatum, Rulus fruticosiis, 

 Geranium dissectum, TrifoUum procumhens, T. minus, Arctium, 

 lappa, Mentha arvensis, Typha latifoUa, Sparganium ramosum. 



Stop upwards at 400 yards. — Cerastium glomeratum, TJlex eu- 

 ropcRus, Spartium scoparium, Prunus spinosa, Lotus major, Geum 

 urianum, Galium cruciatum, Fraxinus excelsior, Pyrus malus, 

 Ulmus montana, Viburnum opulus, Quercus rohur. 



Stop upwards at 500 yards. — Gapsella hursa-pastoris, Lonicera 

 periclymenum, Hypericum puUhrum, Prunus padus, Rosa canina, 

 Jimiperus communis, Populus tremula, Betula alba, Corylus avel- 

 lana, Angelica sylvestris, Senecio aquaticus, Taxus laccata, Erica 

 cinerea. 



Stop upwards at 600 yards. — Ranunculus flammula, Polygala 

 vulgaris, Stellaria graminea, Oxalis acetosella, Hpilolium mon- 

 tanum, Craicegus oxyacantlia, Parnassia palustris, Heracleum 

 spondylium, Carduus lanceolatus, Salix caprea, Lastrea filix-mas. 



The following is a list of the Northumberland and Durham 

 species, about haK the total number, which are northern or mon- 

 tane for Britain as a whole, arranged according to the order in 

 which they are to be met with as we ascend from the low country 

 up amongst the hills. 



Eelow 100 yards. — Thalictrum minus, T. flexuosum, TroUius 

 europceus, Thlaspi alpestre, Viola lutea, Arenaria verna, Stellaria 

 nemorum. Geranium syhaticum, Prunus padus, Sanguisorha offi.ci- 

 nalis, Rihes nigrnm, R. rulrum, R. grossularia, R. alpinum, 

 Sedum villosum, Parnassia palustris, Ligusticum scoticum, Myrrhis 

 odorata, Galium loreale, Crepis paludosa, Carduus heterophyllus, 

 Campanula latifolia, Pyrola minor, Lamium intermedium, Galeop- 

 sis versicolor, Mertensia maritima, Pinguicula vulgaris, Primula 

 farinosa, Salix pentandra, 8. nigricans, 8. laurina, 8. phylicifolia, 

 Listera cordata, Cypripedium calceolus. Allium scorodoprasum, 

 Gagea lutea, Blysmus rufus, Scirpus uniglumis, Carex jiliformis. 



