DICRANACEAE. 53 
Species, or possibly a variety, has been collected, also by Skottsberg, in the 
Falkland Islands. 
. Cardot points out that the base of the leaf in Distichium often 
shows a border of narrow, thin-walled cells ; but though this is frequently 
the case, it never, in my experience, shows any approach to the structure 
of Peeudodistichinsm described above: the border is paler, but usually 
coloured, and not hyaline; and is a ued much less distinct, in com- 
parison with that of Pseudodistichium, by the fact that the internal basal 
cells are all highly elongate, while in the latter they are short—often very 
in Distichium. 
Key TO THE SPECTEs. 
Leaves sharply toothed, at extreme apex; upper ont isodiametrical, nerve 
100-150 « wide near beeowet capsule oblong, ey ere .- 1. Buchanani. 
Leaves entire or subentire; upper cells shortly re Poa F innegula, ne 
150-250 u near base ; capsule shortly and toegilly oval, inclined .. s Breen 
~—_ 
: Psi Seen stv Buchanani (R. Br. ter.) Dixon comb. nov. 
[Plate V, fig. 10.] 
Syn. Picchbalbiichs Buchanani R. Br: ter. in Trans. N.Z. Inst., vol. 29, 
. 482, t. xxxix nag  Wanchsn Buchanani Broth. in Engler 
and Prantl, Musci, 1, 300. 
The description given by v Brown in the Trans. N.Z. Inst. may be 
supplemented by a few notes. The specimen in his herbarium contains 
only two old capsules, one saya oblong and slightly tapering to the 
mouth, as described and 4 nate the other slightly wider and more 
elliptical. No peristome is s be found, and it was not described by the 
author. Tho leaves are distinctly of i forms, all the leaves on some stems 
being gradually narrowed from above the basal part, and gradually con- 
more or less blunt apex, usually bearing two or three very sharp, sub- 
spinulose denticulations—thus heightening the resemblance which the That 
as a whole bears to Campylopus. The leaves on other stems narrow very 
abruptly from a wide, subvaginant but not convolute base to a very narrow 
but not long tubular subula. The nerve in this form is somewhat narrower ; 
with firm, somewhat incrassate walls. In the former type of leaf the upper 
cells are somewhat larger, 10-14 in diameter, quadrate or rhombic, empty, 
very distinct and pellucid, and are continued lower in the leaf than in the 
latter type, only the pixta-costal ones at the extreme base (apart from the 
hyaline border) being elongate and linear. (It may be remarked that i in R. 
Brown’s description of ~~ areolation the terms “above” and “ below 
have been transposed by 
Ps. Buchanani differs cre Fx. austro-georgicum Card. in the shorter, 
much less finely setaceous leaves, and in the capsule, which in that is hemes 
inclined, slightly curved and gibbous, thus closely ee that of Dis- 
erst inclenatum Bry. Eur., while in Ps. Buchanani it is only very slightly 
nelined at most, elliptical, straight and slightly pean at mouth, almost 
resembling that of Distich. capillaceum. 
