Moore — On the Mosses of Ireland. 
361 
2. H, lanuginosum (Bridel). Bryol. XJniy. 1, p. 215. Bryol. Brit., 
p. 169, tab. 19. Briol. Ital., p. 671. Trichostomum lanu- 
ginosum (Heclw.)., Turner, Muscol. Hib., p. 38. Muscol. Brit., 
Ed. 2, p. 105. 
Hab- On heaths, &c. This plant is singular in its habitats. I have 
seen it on the roofs of thatched cottages at nearly sea level, and 
from that upwards to the tops of the highest mountains in Ire- 
land. It often forms the principal herbage on the exposed 
tops of the mountains, where it may frequently be seen in 
continuous layers to the thickness of 1 8 inches or two feet, and 
covering many square yards of surface. 
3. R. heterostiehum (Bridel). Bryol. Univ. l,p. 214. Bryol. Europ., 
vol. ni. Monogr., p. 9, tab. 269. Bryol. Brit., p. 163, tab. 19. 
Briol. Ital., p. 673. Trichostomum heterostiehum (Hedw.), 
Smith, Engl. Bot., tab. 1347. Muscol. Brit., p. 107. 
Hab. Among rocks and on walls — in many parts. Var. ^. alopecurum, 
with more slender elongated stems, fasciculate branches; 
leaves with short hair points, and smaller capsule is frequently 
found along with the typical form. Yar. 7. gracilescens, and 
var. pumilum, Turner, Muse. Hib,, occur occasionally in 
subalpine situations. 
4. R. sudeticim (Br. et Schimp.). Bryol. Europ., vol. m. Monogr., 
p. 7, tab. 264. Bryol. Brit., p. 166, tab. 19. Trichostomum 
microcarpon, (Hedw.). Turner, Muscol. Hib., p. 40. Engl. 
Bot., tab. 1440. Muscol. Brit., p. 107. 
Hab. On subalpine rocks, and the highest of our mountains. More 
abundant in the northern counties than in the other parts of 
Ireland. I have collected it on the top of Galtee-more, Tippo- 
rary, and on several, of the Oonnemara Mountains, also on 
some of the Wicklow Mountains. The variety y3. oUonguiit 
Taylor, in Fl. Hib., p. 20, is noticed under R. microcarpon, 
of Bridel., in BryoL Brit., p. 169, as probably belonging to that 
species. 
5. R. aciculare (Bridel). Bryol. Univ. 1, 219. Bryol. Brit., p. 165, 
tab. 19. Briol. Ital., p. 677. Trichostomum aciculare, Muscol. 
Brit., p. 107. 
Hab. On rocks in the beds of rivers and on wet rocks among the 
mountains in many parts of Ireland. In Erris, Mayo, I have 
observed this moss covering large portions of surface conti- 
nuously, and having the aspect of a species of Hypniim. 
K. I. A. PKOC. — VOL. I., SER. II., SCIEXCK. 
