554 baker's north Yorkshire. 
Pterog-onium Sw. 
I. P. opnithopodioides, (Huds.). Lindb. 
[P. gracile Swartz.). 
Montane A. Range 1-2. 
Damp shaded rocks and walls, not common. 
In Upper Swaledale, on walls between Keld and Muker 
(Baker). 
In Upper Teesdale (Spruce, i843)« 
Near Richmond (Barnes). 
Fruiting 11 mth., rarely. 
Helicodontium Schwgr. 
I. H. pulvinatum (Wahlenb.) Lindb. 
[Myrhiia pidvinata Schpr.). 
Range i. 
On trees, &c., on riv^er banks subject to occasional 
inundation, rare. 
On trees and bushes near the Ouse along Clifton Ings, 
near York (Spruce, 1841). 
Gathered in same locality (J. A. Wheldon, 1889). 
Holgate Beck, York (G. Webster). 
Fruiting 5-6 mths. 
(Sub. Fam. 3. Stereodonte.^:). 
(A. THELIE/E). 
Heterocladium Bry. Eur. 
I. H. heteropterum Bruch. 
Montane B. Range 1-3. 
Moist, shaded rocks and stones amongst the hills neai 
waterfalls. 
Not uncommon on both ranges of hills from Cockmill 
