284 BRYOLOGY OF NEW ZEALAND. 
§ IL. Mniadelphus Mitt. 
5. So microcarpum (Hedw.) Mitt. op. et loe. cit. 
(1883). 
Syn. Hypnum microcarpum Hedw. Bo Muse., P. 214 (1801). 
Hook microcarpa H. f. & W., Fl. N.Z. ii, 123; Handb 
L, p. 495. Disti chophyllum "alolhs CML in Hedwig 
xl 120 (1902) (fide Brotherus). Bye eria sciadophila 
n Trans. N.Z. Inst. xvii, 259 (1884) (fide Brotherus). 
Ho sea maculata Col. op. eit., xvili, 284 (1885) (fide 
Brotherus). 
Quite distinct in the large size, resembling Pter Sh he denti- 
culatum var. robustum, and in the borderless, quite entire leaves with 
very small upper cells. The len gth of the seta and the size of the 
capsule vary greatly. The nerve is long and single, not wanting, as 
erroneously stated in pies oe 
It is a frequent speci 
Eriopus (Brid.) C.M. in Bot. Zeit. 1847, p. 828. 
mall genus of very striking, ane. or semi-aquatie 
mosses ; ite general habit is of Pterygophyllum, but the structure 
very di erent. The leaves are more or less rounded, with a distinct 
and usually stout border, and the nerve is very short and forked 
from th , or may be wanting. The most aetiay feature, iy 
not common to all the species, is the armature of the seta; that 
cristatus may be taken as typical. The short, stout seta is abraptly 
bent at the apex, just below the capsule ; the lower part is rather 
closely set all round with coarse, unicellular spines or bristles, more 
or less at right angles to the seta, and varying in length up to half 
the diameter of the seta; in the upper half they become gradually 
longer and usually denser, quite equalling in length the diameter of 
the seta. Finally, as they approach the angle at the apex of the seta 
they become still longer, more crowded, parallel and pointing up- 
wards, and collected on the outer or upper side of the seta, so that 
just at the bend they oy ae a dense brush or beard, out of which the 
capsule emerges. In E£, flexicollis the uppermost hairs forming the 
brush are distinctly articulate about the middle; I have not seen this 
in E. cristatus, and believe they are all unicellular i in that species. : 
have seen no discussion as to the function of this peculiar brush o 
crest. 
Key. 
egies! be eyperss narrow, as in ae ee 
x lender cM ie » 4 Brownii 
wobone aed wider, often sail peters ae as ere 2 
- Border very stout, cartilaginous, entire or subden- 
tli ticulate; upper cells 25-35 u ihe «+ 1, apiculatus 
rder scarcely cartilaginous, ae isothea ” 
ak Robust plant; upper cells 50-60u abe ses ws 2. eristatus 
3 0 Slender plant; upper cells 15-20@ . sss | « 3, flexicollis 
