412 Proceedings of the Royal Iviah Academy. 
1. -i.^«/ws^re (Schwaegr.). Suppl., tab. 226. Bryol. Europ., voL 
IV. Monogr., p. 9, tab. 405. Eryol. Brit., p. 216, tab. 27. 
Rabenhor.jBryothec. Europ., I^o. 101. Mnium palustre, Hedw., 
Sp. Muse, p. 188. Bryum palustre, Engl. Bot., tab. 391. 
MuscoL Brit., p. 193. 
Hab. "Wet heaths and marshy places. Of frequent occurrence in 
most parts of Ireland, 
50. Leptobryum. "Wilson. 
Peristome as in Bryum. Capsule exactly pyriform, pendulous. Leaves 
acuminate-setaceous. Plant annual. Differing slightly from 
Bryum in its mode of growth ; the annual stems not producing 
innovations from the apex. 
1. Leptolrymn pyriforme (Wilson). Bryol. Brit., p. 219, tab. 27. 
Schimp., Synops. Muscor., p. 329. De JN'otr., Briol. Ital., p. 
434. Bryum pyriforme, Rabenhor., Bryothec. Europ., JS'o. 
93. Schwartz, Muse. Suec. — Hook* and Tayl., Muscol. Brit., 
p. 196. 
Hab. Shady damp banks and rocks. Bj^i the side of the River 
Boyne, about two miles above Drogheda. Caves at Blarney, 
Cork, Isaac Carroll. IsTear the Spa, Clonmel, Miss A. Taylor 
but rare in. Ireland, It grows in great abundance on the 
mould of flower-pots in the Botanic Garden, Glasnevin, both 
in houses, where the heat is seldom under 65 degrees Eahren- 
heit, and in cool frames and conservatories. 
51. Mnium. Linn. 
Calyptra small, cucuUiform, conically attenuated, split at the side, 
fugacious. Capsule long-pedicellated, oval, or oblong, annulate, 
mostly pendulous. Peristome double ; outer teeth 16, lanceolate- 
cuspidate, trabeculated on the inner surface ; inner peristome 
membranous, cut into 16 processes, coroniform, plicated and 
perforated or lacunose in the middle ; intermediate appendiculate 
ciliolse present. Leaves mostly large, smooth, and glossy, with 
spinulose or thickened borders, and percurrent costse ; areolation 
large, of roundish-hexagonal cellules. Inflorescence synoicous or 
dioicous. Male flowers discoid. 
Diagnosis of Species. 
Inflorescence Dioicous. 
Stems erect from a creeping rhizome; leaves 
broad, ovate-ligulate, their margin thick- 
ened, dentate- serrate ; capsule oblong- 
pendulous; fruit stalks aggregated, . 1. M. uNDriATUM. 
