68 
NEW AUUANGEMENT OF 
Char. DiFF. Seta lateralis. Theca ore nudo. Operculum 
deciduum, integrum. 
Fruct. Calyptra dimidiate, nearly as long as the theca, 
scariose (as in most mosses), yellowish. Seta lateral, three 
to eighteen lines in length, mostly rising considerably 
above the stem, rigid, straight, brown, often somewhat in- 
crassated at the apex. Apophysis none. Theca entire, 
very smooth (in one species sulcated when dry), globose 
or subcylindrical, brown ; the mouth naked, large in some, 
and contracted in others, always ? somewhat thickened and 
reddish. Operculum deciduous, entire, subulate or rostrate, 
of the same colour as the theca. Peristo?mum none. Colu- 
mella filiform. SporulcE (only observed in H. aquaticd) 
spherical, tripartite, and pellucid. 
DiFF. Char. Seta lateral. Theca with a naked stoma. 
Operculum deciduous, entire, 
Veg. The stems of the Hedwigiie are much branched, 
as might be generally inferred from the fructification being 
lateral. In one species they are floating, in another pro- 
cumbent, in the others erect ; in H. Hornschuchiana they 
are also densely matted. H. Himiholdtii and secunda are 
branched in a subpinnated manner. The leaves differ 
much in shape, passing from obovate to subulate, and are 
in some species destitute of a nerve ; but there is one in 
H. aquatioa, and one also remarkably broad in H. Horn- 
schuchiana. The leaves are rarely piliferous, and as rarely 
serrated ; they are smooth or striated, inserted on all sides 
of the stem, erect, and sometimes flexuose or secund. 
Oss. Several species of this genus bear a strong resem- 
blance by their leaves to Anictangium. H. Hornscliucht- 
