208 THE FLORA OF HALIFAX. 



Gephalozia diyaricata, (Smith), Dumort. 



1888. About Todmorden, tolerably common. — A. Stansjield, 

 Lees' Fl. 



Scapania resupinata, (L.) Dum. (Jungermania, L.) 

 1775. /. Bolton, Cat. No. 298. 



Scapania nemorosa, (L.) Dum. (Jungermania, L.) 



1888. Todmorden — -A, Stansjield , Lees' F 7. ; Prs. Br. Hep. 



Scapania undulata, (L.) Dum. (Jungermania, L.) 



1775. /. Bolton, Cat. No. 297. 



1888. North Dean — H. F. Parsons; Gorple — /. Nowell ; 

 Rishworth Valley — Lees' Fl. 



An extremely common and most variable plant. It varies 

 both in size, colour, and leaf margin. It inhabits well- 

 troughs, road-side horse-troughs, Sphagnum swamps, etc., 

 and grows on the rocks and boulders in every clear rill 

 and streamlet in the parish, from source to outlet. 



A form with cells walls thicker than usual, approaching 

 those of S. irrigua, and shape of leaf approaching S. 

 purpurescens was found in 1901 in great beds on Erringden 

 Moor ; and a purple form resembling purpurescens in Reaps 

 Water Valley—/. T. A spin I 



Some continental authors have made a number of vars. {vide 

 Nees, " Eur. Leber.") ; English students, so far, have not 

 considered it necessary. 



Scapania purpurescens, (Hook.) Tayl. (S. purpurea, Carr). 



1888. Plentiful in bogs amid grass and Sphagnum, above 

 the Derby Inn, Rishworth Valley — F. A. Lees, Lees Fl. 



It is just possible this record represents a purple form of 

 S. undulata. 



Diplophyllum albicans, (L.) Dum. (Jungermania, L.) 



1775. /. Bolton, Cat. No 299. Very common — Herb. Leyl. 

 Common, noted in numerous stations. 



Lophocolea bidentata, (L.) Nees. (Jungermania, L.) 

 1775. /. Bolton, Cat. No 294. Frequent — Herb. Leyl. 

 1868. Grimscar Wood — C. P. Hobkirk, Hist. Hudd. 

 Scar, Hardcastle — /. Needham. Elland Park Wood ; North 



Dean Wood ; Ogden Clough ; Butts Clough ; North 

 Wood, Coley ; Parrock Clough ; on soil in plant-pot, 



cold fern-house, Well Head, etc. ! 



