DICRANACEARF. 15 
4. Dicranoloma platycaulon (C. M.) sp. nov. [Plate III, fig. 10.] 
Syn. Dicranum platycaulon C. M. MS. in herb., et Gen. Muse. 
; (nomen). 
compressam, magnam, lcm. | atam pee nese, Folia magna, begistinstiee 
carinatam nec tubulosam angustata, marginibus per totam subulae longi- 
tudinem argute grossiuscule serratis. Costa in media lamina 100-120 » 
lata, in subula perdistincta, lata, dorso valde prominens, irregulariter dis- 
tanter spinoso -dentata, breviter excurrens. Cellulae alares magnae, 
auniiite dilatatas, quarum unam majorem ad costam paene attingentem, 
alteram multo minorem, a costa cellulis multis angustissimis interjectis 
ormantes. 
Lamina folii inferne limbo hyalino sat distincto circumdata; areolatio 
inferior vacligtiieta’ valde conflata, e cellulis perincrassatis va rosis 
instructa ; cellulae subulae perbreves, irregulares (ellipticae, triangulares, &c.), 
8-13 p latae, parietibus tenuibus mx porosis, marginem versus saepius 1-2 
seriebus angustioribus, incrassatis. 
Perichaetium altiuscule exsertum, conspicuum, foliis internis perlatis, 
abrupte longiuscule tenui-aristatis. Setae aggregatae Bd 4), circa lem. 
longae. Theca elongate ate leniter curvata, stru 
Hab. — Greymouth (R. Helms); Mount Carzill, ere (W. Bell) ; 
Taranaki (Jupp); Westland, 1872 (A. R. Bloxam); Lee Bay, Stewart 
Island, on logs in forest, October, 1908 (Cockayne, No. 8234); Mount 
gmont, January, 1912 (W. Gray, Nos. 119, 124 ae 
Type in Herb. C. Mill., in Mus. Bot. Ber olin 
The specimens coll. Jupp and Bloxam were sent me from Mitten’s 
herbarium under the name of D. angusti 
This is a very ftie and distinct species, resembling D. robustum, D. 
dicarpum (forma polyseta), &c., in habit, but amply and easily dis- 
ed by the character of the subula and by the upper areolation, 
which is like none of the remaining New Zealand species, while in 
of the cells closely resembling the European Dicranum Bergeri. The wide 
and comparatively flat subula, not tubular nor convolute, is also a dis- 
tinguishing character from most of the allied plants. The leaves have a 
less firm, more delicate texture than in most of the species. The cells 
of the expanded lamin lamina vary considerably in length, but are always 
remarkable for their indistinctness, owing to the slight difference in colour 
and ony ip between the cell-wall and the lumen 
setae vary on a single tuft from 1 to 4 in a perichaetium. 
5. Peale ae tg robustum (H. f. & W.) Par., Ind., ed. ii, p. 29 (1904). 
-1) 
[Plate I, 
sei robustum H. ¢. & W. in Lond. Journ. of Bot., 1844, 
Dus., Beitr. zur Bryol. Magellanslinder, &c., in Arkiv. fér Bot., 
bd. 4, No. 1, p. 26 (fide Cardot). 
Distributed throughout the subantarctic region. 
*TI ought, however, to mention that the above dg re" eas figures are dra’ 
up from ee rn Cargill plant, sent me by Dr. Brotherus. I have not seen the 
pee bevy uth specim: 
