496 baker's north YORKSHIRE. 
In Teesdale, on ash trees (Barnes 1879). 
At Upleatham and Roxby in Cleveland (Barnes). 
Near Helmsley (Ingham). 
Fruiting' 4-5 mths. 
6. O. Lyellil Hook, and Tay. 
Range 1-2. 
Trunks of old trees, not very common. 
Frequent upon trees, especially amongst the hills, rarely 
fruiting (Baker). 
In fruit on tree near Welburn, Castle Howard (Spruce 
1844). 
Near Laskill, Bilsdale (Baker). 
Trees, near Helmsley (M.B.S.). 
Near Guisbro', and found with fruit near Muker, Upper 
Swaledale, and at Askrigg (Barnes 1890). 
Near Hackness (Ingham). 
A marked form, with rigid closely appressed leaves was 
found on trees near the Ouse at York by Spruce 1843). 
Fruiting 7 mth. 
7. O. diaphanum Schrad. 
Range 1-2. 
Trunks of trees, on walls and old pales. 
Frequent upon trees and bushes, and occasionally on 
walls and rocks in the low country and amongst the 
hills (Baker). 
On trees, near Malton and Pickering (M.B.S.). 
Fruiting 4 mth. 
8. O. cupulatum Hoffm. 
Range 1-3. 
Rocks and walls in limestone districts. 
Frequent upon walls and stones by streams, ascending 
