456 
Proceedings of the Royal Irish Academy. 
1. C. undulata (Web. et Mohr). Bot. Tasclienb., 216. Briol. 
Ital., p. 343. Atrichum undulatum, P. Beauv. — Rabenhor., 
Bryothec. Europ., No. 282. Wilson, Bryol. Brit., p. 203, tab. 
10. Polytriclium undulatum, Hedw. Stirp. 1, p. 43, tab. 
16-17. Hook, and Tayl., Muscol. Brit., Ed. 2, p. 43. 
Hab. Damp sbady places among grass and about the roots of trees. 
Yery common throughout Ireland. 
73. Oligoteichum. De Cand. 
Calyptra cucuUate, splitting longitudinally, partially hairy or papillose 
at apex. Capsule long pedicellate, ovate-oblong ; lid shortly ros- 
tellate. Peristome as in Catharinea, from which this genus hardly 
differs, except in the more campanulate calyptra, which is 
thinly clothed with long hairs, and the more fleshy, nerved leaves, 
with their nerves closely lamellated on the upper surface. 
1. 0. herc7/mcum (De Cand.). Flor. Gallic. Bryol. Brit., p. 205, 
tab. 10. Bryol. Europ., vol. iv. Monogr., p. 4, tab. 413. 
Schimp., Synops. Muscor., p. 436. Briol. Ital., p. 341. Ea- 
benhor., Bryothec, Europ., IsTo. 144. Atrichum hercynicum, 
P. Beauv. Polytrichum hercynicum, Hedw. St. Cr., 1, tab. 
15. Smith, Engl. Bot., tab. 1219. Hook, and Tayl., Muscol. 
Brit., Ed. 2, p. 44. 
Hab. Banks where the soil is bare in mountainous situations. 
Nephin mountain. Mayo, Dr. Dickie (1857), also Donegal. 
Lugnaquillia mountain, Wicklow, and between Wooden- 
bridge and Arklow. 
74. PoGONATUM. Bridel. 
Calyptra cuculliform, small, deeply cleft, submembranaceous, densely 
covered with long fulvous hairs. Capsule on long pedicel, ob- 
long, or nearly hemispherical, not angulate, erect or inclined ; 
lid rostellate from a convex base. Peristome as in the two pre- 
ceding genera. Columella winged. Stems simple or branched, 
growing from underground rhizomes. Leaves rather rigid, 
spreading regularly from a sheathing base, costate, the rib 
broad and covered on upper surface with numerous lamellae. In- 
florescence dioicous ; male flowers discoid. 
Diagnosis of Species. 
a. Stems elongated, branched. 
Leaves elongate, patent, subulate-lanceolate, 
sheathing at base, serrate ,• keel spinulose 
at back ; capsule with an apophysis, . LP. alpinum. 
