354 OTHER CLYDE ISLANDS. 



dikes, which simply separate the rock, without inducing 

 any change of structure upon it. Mr. William N. JVIac- 

 Cartney, of Glasgow, discovered on Ailsa several years 

 ago the rare plant Lavatera arborea, or tree mallow. It 

 grows high on the southern cliffs, and reaches the unusual 

 height of 6 feet. He has carefully collected all the plants 

 during two visits our own was too hurried to admit of 

 this and finds 109 species of flowering plants, of which 14 

 are grasses. The cryptogamic flora is unusually abundant 

 for a space so limited the peculiar situation, but still more, 

 perhaps, the terraced character of the sheltered side, favouring 

 a prolific vegetation. 



FINIS. 



