1911-12.] BOTANICAL SOCIETY OF EDINBURGH 47 



central base long, cylindrical, el :i attached. '06— < 



-9 mm., slightly granular, ultimately hyaline, outv. 

 shorter. bluntly oblong, with two to four short rows of cells 

 next margin smaller still, sharply oblong. '016 by '006 mm., 

 but all basal cells becoming hyaline ; upwards cells become 

 oraduallv shorter and mer^e nearlv transverselv into the 

 upper dense, opaque, chlorophyllose, round or roundly 

 quadrate cells, length variable from '009 to '016 mm. in 

 longer diameter, in upper third somewhat smaller. '007—9 mm. : 

 nerve soon turning brown, firm, solid, breadth near 

 •05-065 mm., a little broader upwards then lessening to 

 acute apex, of dense structure within ; the posterior wall 

 shows a single row of chlorophyllose cells as in the pagina, 

 but nearer the front a row of three largish pellucid cells : 

 margin of leaf recurved a little more than the lower half, 

 entire : a thin transverse section of leaf shows the margins 

 thickened in a remarkable manner, by a round cluster of 

 cells grouped together without order, in number from seven 

 to fifteen so as to form a thick round club three times the 

 thick: se : pagina ; this thickening is often 



a little below the middle of leaf but smaller. Barren. On 

 the red rock in several places near Gairloch. This m< 38 is 

 rather closely allied to Gr. trichophyll Grev.). 



Another interesting moss lee a to be recorded, viz. 

 a Bryum, so closely resembling in size and appearance the 

 greenish forms of B. that I passed it on more 



than one occasion without inspection. 



Bryum I Uum,sp. nov. — Tufts very dense, slightly 



convex. ^re e n above, pale but tending towards a reddish tint 

 below ; stems very slender, about half an inch or less in height, 

 simple or sparsely divided, reel and red-radiculose in lower 

 half, to which also minute acutish leaves are attached : upper 

 leaves rather suddenly enlarged, but still minute, scarcely a 

 millimetre in leno^h. closelv arranged and even imbricated so 

 as to form, at and near apex, a rather elongated comal group : 

 such upper leaves are oblongo-ovate, concave, narrowing 

 convexly above to a point, from which arises a long, slender 

 acumen about one-third the length of leaf proper, or from 

 2 to -35 mm. long, terminating acutely and having the same 

 construction as the rest of the pagina. but the cells composing 

 it a little longer : nerve slender and thin, breadth near base 



