
<a —e 
244 THE NORTHERN MICROSCOPIST. 
or Derbyshire, is Diphyscium foliosum, the Leafy Buxbaumia : 
distinguished by its curious plicate membrane forming the peristome ; 
stem short ; cauline leaves ligulate ; perichzetial leaves much larger 
and broadly-lanceolate, with a nerve running out into a stout hair, 
laciniate at the top. Fig. 16. Like Zetradontium Brownianum it 
is often found with its growth downwards. 
Two small and rare species of the Thread-Mosses are found at 
Southport, Brywm Marrattii and Bryum calophyllum ; and another 
of the Bryace fruiting in September, and rare, is Webera Ludwigit, 
collected on the Scotch mountains and also on Snowdon. It has 
several sets of shoots rising one above the other according to the 
years in which they have been produced, only the last series being 
green, the others being in most cases darkened by snow-water. 

Fig. 17. 
Also on the Scotch summits, not lower than 3,000 feet, is the 
conical Mouth-Moss, Conostomum boreale, so called from the teeth 
of the peristome forming a cone by their union at the summit. It 
is placed next to the Bartramias, greatly resembling in appearance 
the Fountain Apple-Moss, Philonotis fontana. The genus Bart- 
ramia, named in honour of John Bartram, an American botanist 
and traveller, has a terminal seta and sub-globose capsule with double 
peristome ; calyptra dimidiate. An interesting species belonging 
to this group is Brentella arcuata, the curved-stalked Apple-Moss, 
being almost entirely confined to the British Isles, Found rarely in 
fruit on waterfalls and rocks in sub-Alpine districts, its leaves, from 
a broad sheathing base, are ovate-lanceolate, serrulate and spreading. 


