VOL. XVIII (3) THE MOSSES OF GLOUCESTERSHIRE 269 



Grimtnia Hartmani Schp. 34. On rocks Rodmore Grove, 

 near Hewelsfield (Ley) ; also Hudnalls, near St. Briavels. 

 This moss is abundant at Rodmore Grove. 



Grimmia commutata Hiibn. 34. Found only on roofs in 

 the Forest of Dean. Roof near Blakeney c.fr., and roof at 

 Staunton. 



Rhacomitrium aciculare Brid. 34. On rocks by streams 

 in the Forest of Dean ; also May Hill. Not common. 



Rhacomitrium fasciculate Brid. 33, 34. Damp rock near 

 Mitcheldean (Ley). Quarry near Milkwall. On slag on railway 

 embankment, Dowdesvi^ell. Barren plants only have been 

 found in this County. This moss has certainly been intro- 

 duced with the slag at Dowdeswell, and is probably only a 

 casual in the other localities. 



Rhacomitrium heterostichum Brid. 34. Forest of Dean ; 

 not common. The Buckstone, Staunton c.fr. (Ley). Near 

 Brookweir (Shoolbred) ; Hudnalls c.fr. ; Rodmore Grove. The 

 plant from The Buckstone in Ley's herbarium was named 

 R. sudeticum. Var. alopecurum Hubn. (34) a form with obtuse 

 leaves. The Buckstone (Miss Armitage) ; Abbot's Wood ; 

 near Mitcheldean ; Hudnalls ; Rodmore Grove. Both the type 

 and variety seem to be confined to the Old Red Sandstone rocks. 



Rhacomitrium lanuginosum Brid. 33, 34. Tidenham 

 Chase and on wall built of Old Red Sandstone conglomerate, 

 Brookweir (Shoolbred); Hudnalls; rocks by railway at Oxenhall ; 

 Chase End Hill. On slag, railway embankment, Dowdeswell. 

 Certainly introduced with the slag at Dowdeswell, and only a 

 casual elsewhere. Barren plants only found. 



Rhacomitrium canescens Brid. 33, 34. Near Bristol 

 (Thwaites) . By Symonds Yat Station (Ley) . On heaths and 

 stony ground in yarious parts of the Forest of Dean. On rocks 

 by railway at Oxenhall. On slag by the railway at Dowdeswell 

 c.fr. Sparingly on Cleeve Hill Common. A native moss in 

 the Forest of Dean ; probably introduced elsewhere. 



Ptychomitrium polyphyllum Fiirn. 33, 34. On rocks (not 

 calcareous) in many parts of the Forest of Dean. Near Bristol 

 (Thwaites). Hanham (Miss Roper). On slag by the railway 

 at Dowdeswell. Like the species of Rhacomitria this has been 

 introduced with the slag. 



