DICRANACEAE. 39 
I only know of this species in New Zealand from the Lyttelton —o 
Banks Peninsula, where it was gathered in 1892 by Beckett; and f 
Masterton Park, Mauriceville, Wairarapa, where it was gathered in 1910, 
and sent me by Mr. W. Gray. It is also found in Tasmania and Western 
Australia 
4. Pee an nervosum (Hook.) Par., Ind., p. 972. 
. Phascum nervosum Hook., Musc. Exot., t. 105. Astomum ner- 
vosum C. M. in Bot. Zeit., 1847, p. 98. 
Var. minus Roth, Aussereuropdischen Laubm., 1, 160, t. xiv (Watts and 
Whitelegge, Census Musc. Australiens., p. 33—nomen solum). 
Roth has pointed out some slight differences between the Australasian 
b 
: flowers, 
perhaps justify its being treated as a variety of that species rather than as 
e form 
The comparatively tall, rigid, julaceous stems, and short, strict leaves 
with stout nerve, will separate it from all the other species except the 
following. It appears to be widely distributed in Australia, but from 
New Zealand I have only seen it from the original locality quoted in the 
Handbook—viz., “‘ Bay of Islands, North Island, Hooker and Colenso.” 
R. Brown (Trans. N.Z. Inst., vol. 26, p. 302) states that it is to be found 
in the same localities as Phascum apiculatum, but not so commonly, the 
localities he gives for P. apiculatum being es Port Hills and on the plains 
in the neighbourhood of Christchurch.” The plant in Brown’s herbarium 
under this name (P. nervosum) from Lyttelton Hills is, however, P. graci 
lentum Mitt., and it is probable that 6 plant referred to by him in ae 
above passage really belonged there a 
This species has usually been sited, as Pleuridium nervosum ee 
H. f. & W. (FI. N.Z., 2, 58), but it is still retained there under Phascu 
Pleuridium being only mentioned as a subgenus 
5. Pleuridium curvulum (C. M.) Par., pi Ind., p. 277; Roth, 
Aussereuropaischen Laubm., p. 162, t. xvii 
. Astomum curvulum C. M. in Hedw.. 1898, p. 78 (nec Phascum 
curvulum Tayl.). 
I have not seen this species, which was described by C. Miiller from a 
Roth keeps the two apart, and gives some distinguishing characters, I have 
. here. As far as can be gathered from the descriptions and 
figures, it differs from P. nervosum var. minus in the following way: The 
lowest Beto in that are ovate, with a distinct nerve ; the mid-stem leaves 
ovate-lanceolate, with the nerve percurrent or excurrent in a stout point. 
In P. curvulum the lowest leaves are almost orbicular, obtuse, and nerveless, 
the middle ones ovate and subobtuse, and = the nerve ceasing above 
the middle ; and the upper cells are more incrassate. 
P. nervosum (and presumably in ferrari also) the upper areola- 
tion is somewhat wider and more irregular, often rhomboid or subhexagonal, 
with more oblique end-walls, than in the earlier species. 
