102 BRYOLOGY OF NEW ZEALAND. 
This species appears to have been overlooked ; it can hardly be rare. It 
occurs in the Kew collection as “ F. Knightii,” Reic hdt., det. Mitten, 2/86, 
N.Z., Reader, 34, 1880” (F. Knightii belongs to the § ‘Amblyothallia, and 
cannot be this). It is quite distinct in the very small and very obscure 
areolation and leaves falcato-crisped when dry from all the bordered species 
except the following. 
. Cheesemanui in C. Miiller’s herbarium is a poor, ree sterile 
form of this. F. lineari-limbatus is in fruit and better developed, and 
may, with the former, be considered a varietal ee with narrower leaves 
and dorsal lamina scarcely reaching to base, often ceasing far above. 
4.* Fissidens gonioneurus C. M., MS. in herb., et Gen. Muse. Fr., p. 59 
(nomen) subsp. nov. 
leptoclado affinis; elatior, ad. 15cm. altus; folia multijuga, con- 
ferta, ate: erecta, nec patentia nec flexuosa, Rosviors. e medio vel infra 
sensim attenuata, acutiora; costa ervalida, perpellucida, apud “caine 
vaginantis apicem flecuoso-angulata, supra flexuosa. Cetera ut in 
F. leptocl Fructus ignotus. 
Hab.—New Zealand ; leg. Helms; 1885 (herb. C. M.). 
The specimen sent to me was between mica, and it was not easy to 
determine the position of the leaves when dry, but I believe them to be 
scarcely altered ; this would give a very marked distinction from F. lepto- 
cladus. In any case, however, the tall habit, very straight, rigid leaves, 
much stouter nerve, &c., appear to be good characters, as is the ending 
of the nerve as it leaves the vaginant lamina, although this is a feature 
shared by several other species (e.g., F. oblongifolius, F. campyloneurus). 
F. rigidulus. More recently, however, I have seen specimens which indicate 
that the characters given above are some of them inconstant, and that 
the plant is unworthy of higher than subspecific rank at the highest (ef. 
notes on excluded species at the end). 
§ Pachylomidium C. M. 
5. Fissidens rigidulus H. f. & W., Fl. N.Z., ii, 61, t. 83 (1855); Handb. 
N.Z. Fl. p ‘ 
Syn. F. Lechleri Hampe in Bot. Zeit., 1864, p. 340. 
Distrib.—Tropical South America; Chile; Australia; Tasmania; New 
Zealand. 
One of the most distinct species in the tall branched stems, forming 
_ elongate but rather narrow fronds, the subaquatic habit, and stoutly 
bordered leaves with very obscure opaque areolation. The leaves are 
incurved-falcate when dry, Way spirally twisted points. The fruit 
to be comparatively uncomm 
aS M. 
6. Fissidens Taylori C. M., Syn., 1, 65 (1848). 
Syn. F. brevifolius FE f. & W., Fl. N.Z., ii, 61, t. 83 (1855) ; Handb. 
N.Z. Fl. p. 408 
P. < at : . py gmaeus Hornsch.). F. ae C. M. & Beck 
rans. N.Z. Inst., vol. 25, p. 294, t. 43 (1892). 
There is no specimen of the New Zealand F. brevifolius in Hooker's 
eeateanies 4 (it appears to have been found in very small quantity, and 
