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axils of the upper stem leaves, archegonia with a few rather 
long filiform paraphyses; no distinct perichoetial leaves; 
vaginula short, cylindrical ; seta an eighth to a quarter of 
an inch long, erect; capsule with a distinct neck, smooth, when 
dry obconical, widest at the mouth, operculum conical acute. 
Calyptra when young brown, very narrow conical, cleft on 
one side for a third of its length, cells spirally arranged ; 
peristome half immersed, teeth sixteen, very slender, linear- 
subulate, transverse articulations distant. 
Fruit matures in August. Discovered near Glasnevin, 
Dublin, on the top of a sandstone wall, by Mr. David Orr. 
It has no nearly related European allies. 
Weber a Breidleri, Juratzka (fide Fergusson). Dioicous, 
growing in extended light green patches, procumbent in the 
lower part, which is of a reddish brown colour ; stems about 
1 \ inch long, leaves ovate, decurrent, erecto-patent, concave, 
serrated towards the apex, margin recurved; nerve thin, 
vanishing below the apex; areolae rather large, upper ones 
narrow elongate, acute at both ends, lower ones narrow 
elongate-quadrangular. Male flower terminal, discoid . 
outer perigonial leaves spreading, elliptic-lanceolate, longer 
than the stem leaves, saccate at the base, margin strongly 
recurved, apex cucullate, serrated ; inner perigonial leaves 
obovate, suddenly acuminated, serrated at the diaphanous 
apex, areolse large, elongate-quadrangular; antheridia sub- 
sessile with short filiform paraphyses. Perichoetial leaves 
linear lanceolate, recurved at the margin, strongly nerved, 
nerve vanishing below the apex ; seta geniculate near the 
base, slender; capsule oval pendulous, glaucous green when 
young, pale reddish brown when mature. 
Fruit matures July to August. Habitat : Abundant on 
wet debris of slaty rocks near springs, on the table lands 
above the head of Glen Callater, also on Loch-na-gar, and in 
Canlochan Glen. Its companions above Glen Callater are 
Dicranv/m Starlcii, D. falcatum, Oligotrichum hercynicum , 
and Polytrichum scxangularc. In the springs themselves 
