Page:Transactions of the Natural History Society of Northumberland, Durham, and Newcastle-upon-Tyne (1867).djvu/173

3. P. avium Prunus avium, L. Denizen. English type. Area C, N, D. Range 1, 2.

Not unfrequent in woods and by stream-sides, but doubtfully indigenous, ascending to 1100 feet in Rookhope (Wear district).

4. P. cerasus Prunus cerasus, L. Alien.

In plantations in several places near Embleton, but always planted (R. Embleton).

2. SPIRAEA, L.

1. S. ulmaria Filipendula ulmaria, L. Native. British type. Area C, N, D. Range 1, 2.

Common by stream-sides and in damp woods, ascending to 550 yards on Cheviot in Dunsdale, and as high in Harwood Dale.

2. S. filipendula Filipendula vulgaris, L. Native. Xerophilous. English type. Area C, N, D. Range 1.

On the basalt at Crag Close near Barrasford (T. R.); and at Spindlestone, plentiful in the plantations (W. Richardson. T.). On the Magnesian Limestone at Byers Quarry near Whitburn, and at Coniscliffe and Baydales near Darlington (E. R!).

3. S. salicifolia Spiraea salicifolia, L. Alien.

In several places in parks and plantations, as Hulne, Howick, Wallington, and Gibside.

3. GEUM, Linn.

1. G. urbanum Geum urbanum, L. Native. British type. Area C, N, D. Range 1, 2.

Common in woods and on hedge-banks, ascending in Coquetdale to Harbottle, Weardale to Elm Ford Wood, 1150 feet, and Teesdale to 350 yards. This and the next frequently produce natural hybrids, like the primrose and cowslip.