ACROCARPOUS MOSSES. 481 
Force, at Whitfield Gill in Wensleydale, also at Aysgarth 
Force (Barnes 1890). 
Clifton near York (Ingham). 
Rarely fruiting. Only found sterile in Yorkshire. 
7. B. spadicea, Mitt. 
{Trichostomum rigididum Sm. ex parte.). 
Range 1-2. 
Damp walls, rocks, and sandy banks of streams, not 
common. By the Tees at Gainford, and near the Abbey 
bridge, Rokeby. In Cleveland, not unfrequent by the 
sides of streams at Easington, Kilton, Roxby, Skelton and 
Saltburn (Barnes). 
In Eskdale at Arncliflfe, and by the sides of other 
tributary streams of the Esk near Whitby (M.B.S.). 
Fruiting 9-1 1 mths. 
8. B. rigidula (Hedw.) Mitt. 
{Didyviodon rigiduhis Hedw.). 
Range 1-3. 
Damp rocks and shaded walls in calcareous districts, 
not uncommon. 
In the low country, and amongst the hills ascending to 
the main limestone scars of Mickle Fell (Baker). 
. Walls in the Castle Howard district, also in Teesdale 
and near Scalby Mill, Scarbro' (Spruce 1843). 
At Richmond, Gunnerside, and Brompton on the Swale; 
also in Cleveland, at Kilton, Roxby and Saltburn (Barnes). 
Fruiting 7-9 mths, 
9. B. cylindrica (Tay.) Schpr. 
Range 1-2. 
On walls, especially in limestone districts, not common. 
Walls at Ganthorpe and Crambeck, and in other Castle 
Howard woods (Spruce). 
Bot. Trans. Y.N.U., Vol. 3. 2 F 
