NEW VARIETIES OF BRITISH MOSSES 877 
forms do occur, starved states of the type also at times taking on a 
close resemblance toit. The localities from which I have records of 
the var. gracilis are as follows (I have seen specimens of all except the 
Broadford plant referred to by Fergusson) :—Broadford, Skye (Fer- 
gusson) ; Glen Phee, 1868 (Fergusson, in Herb. Wils.); Lake District 
(probably about High Style), 1870 (Barker); Loch Coruisk, Skye, 
1881 (Barker); Cader Idris (Weyman, 1893; Dixon, 1901); Moel- 
yr-Ogof, Carnarvonshire, 1898 (Jones); Cwm Idwal and Clogwyn- 
du-ar-ben-y-Glyder, 1899 (Jones); Cwm Bychan, Merioneth, 1899 
(Jones) ; Roadside near Talsarnau, Merioneth, 1901 (Jones ¢& Dixon), 
Weisia curvirostris ©. M. var. instants, var. noy. Very tall and 
robust, 3-5 in. high, forming large masses on the face of moist or 
dripping rocks; dark or brownish green above, brown or blackish 
below, stems closely tufted and often radiculose, but rarely matted 
together and never fragile or encrusted. Leaves long (2 mm.), 
loosely set, when dry divergent below, curled and incurved above, 
when moist widely spreading from an erect subsheathing base; gradually 
tapering from a distinctly enlarged base (‘4-5 mm. wide) to a sub- 
acute point; upper cells rectangular and subquadrate, pellucid. 
Capsule narrowly elliptic, tapering to a distinct neck, dark brown, 
thick-walled. ‘ 
I gathered this plant for the first time in 1893, on wet rocks in» 
the gully running down from Meall-nan-Tarmachan, Perthshire, 
‘into the little Loch-na-Lairige, but was quite unable to identify it, 
as was also Dr. Braithwaite, who sent it to Mr. Mitten. The latter 
-wrote as follows :—‘* The moss you send from Perthshire is, or is 
supposed to be, a state of the old Dicranum virens ; it is so different- 
only slightly less robust, and also differing in being to some extent 
encrusted with carbonate of lime, which is never the case with our 
