limestone, ascending Coquetdale to porphyritic cliffs at Windyhaugh (250 yards), and Weardale to the wood above the village of Wearhead (1150 feet).
8. H. montanum, L. Native. Xerophilous. English type. Area D. Range 1.
In several of the Magnesian Limestone denes, as Castle Eden, Dalton, Hawthorne, and Ryhope.
9. H. calycinum, L. Alien.
Planted near Cornhill (R. Embleton. A.); and at Hulne Abbey near Alnwick (T.). A native of Turkey.
Order 17. ACERACEAE.
1. ACER, L.
1. A. campestre, L. Native. English type. Area D. Range 1.
Clearly native in the denes of the Magnesian Limestone, but doubtfully so north of the Tyne. It may be indigenous in the woods on the steep banks of the Wansbeck about Morpeth and Mitford, where there are trees by the stream side 30 to 40 feet high, but in Cheviot-land it seems evidently introduced.
2. A. pseudo-platanus, L. Alien.
Common in woods and hedge-rows, frequent in the low country, and one of the commonest trees about farm-houses in the dales, ascending in Harwood Dale to 1600 feet, and in East and West Allendale to 1650 feet. Winch regarded it as indigenous, and it is considered to be so by Mr. Carr, whose remarks on the subject will be found in the third volume of the Transactions, page 9.
Order 18. GERANIACEAE.
1. ERODIUM, L’Herit.
1. E. cicutarium, Sm. Native. British type. Area C, N, D. Range 1.
Frequent in dry sandy soil, especially near the sea. Near Wooler at 350 feet.
