POTTIACEAE. 147 
Although clearly allied to T. serrulata, this seems to be a well-defined 
species. 7’. serrulata (judged by herbariuni specimens only) appears to be 
of a paler, reddish colour; the leaves taper gradually to a narrow acumen ; 
the serratures are fairly strong, and are frequently intermixed with small, 
pellucid, spinulose cells. Here the deep-green colour and the very fragile 
pte appear to have some significance; the leaves are in outline almost 
in . rubra ; the serrations above are very coarse and irregular, sarge 
margin formed by a rather distinct border of Hho more ellacid cells, 
-and only sae slightly denticulate. In the present species they are wider 
above, with very coarse irregular serration, the large, numerous deep-red 
spinulose teeth often forming a very beautiful contrast to the deep-green 
chlorophyllose lamina cells. The lamina is very fragile, often leaving the 
stout red nerve almost entirely bare. I have attempted to show the 
principal leaf-characters Seen these three species on Plate VIII. 
Both species are dioicous; I have not found any difference in the 
sporophytic characters. 
rous species of this group with serrated leaf-margins have been 
described from ny America (Fuegia, &c.), but none of them appear to 
agree with our plant. T. pseudo- robusta Dus. is perhaps the nearest, but 
is a much taller, more robust species, with longer, more gradually tapering 
leaves, more regularly toothed, with distinct aculeate teeth and somewhat 
different areolation. It has als so a different peristome, the tube being 
about three-quarters the length. of the whole; in T. serrulata and 
T. serrata it is only about half the length. 
11. Tortula eee R. Br. ter. in Trans. N.Z. Inst., vol. 30, p. 403, 
t. 37 (1898). 
Syn. T. Stevensii Br. ter., op. cit., p. 405. T. kowaiensis R. 
Br. ter., op. cit., p. 406. Barbula aia ie C. M. in Hedw., 
XXXVil, ?. ig (1898). Fora sig it Broth, in Engler 
and Prantl, Pflanzenfam., Muse 
This species is very distinct among he entire-leaved aristate Syntri 
chiae, by the almost smooth red arista, hyaline only at tip, very gliort, 
distinct. 
It is one of the finest of the New Zealand schist ies a robust tall 
plant, reddish in colour, with long seta and fai 
Specimens of the three species of Brown's ats ‘above are 
herbarium, and all belong to one and the same species; the variability 
which obtains to some extent in the degree of acuteness of the apex 
accounts in great part for this duplication. 
I have examined B. austro-alpina C. M. (“ Peel pote naps 
Jan., 1900, T. W. N. Beckett”) at Kew, which, although n 
gathering, may no doubt be relied upon as being C. Miiller’s aie It 
