DICRANACEAE 49 
faleatae), with D. faleatum, Starkiit and Blyttii, is quite untenable. There 
are no enlarged alar cells, and the falcate-circinate leaves are really all that 
the plant has in common with those species. 
Among the New Zealand species of Ditrichum the habit is quite peculiar, 
and the plant easily recognizable. It is, so far as is at present known, 
confined to Auckland. 
EXCLUDED SPECIES. 
Ditrichum faleatum (R. Br. ter. as Trichostomum) Broth. is a Dieranum. 
D. Hallit (R. Br. ter. as Trichostomum) Broth. is Dicranum trichopodum 
Mitt. 
D. Moretonii (R. Br. ter. as Trichostomum) Broth. is Holomitrium peri- 
chaetiale (Hook.) Brid. 
D. radiculosum (R. Br. ter. as Trichostomum) Broth. is a ““ composite 
species :. the sterile tuft in Brown’s herbarium is D. brevirostrum (R. Br. 
ter.) Broth.; a single fruiting-stem belongs to something apparently quite 
different but altogether indeterminable. The time and place of collecting 
were, it will be noted, exactly the same as for D. brevirostrum. 
D. avonense (R. Br. ter. as Trichostomum) Broth. belongs to Pottiaceae. 
I have examined the types of all the above in R. Brown’s herbarium. 
9? 
thus: ‘Die Beschreibungen von D. seabrifolium Mitt. (Tasmanien) und 
D. punctulatum Mitt. (Neuseeland) sind mir unbekannt geblieben.” Watts 
and Whitelegge (Cens. Musc. Australiens, p. 36) give “ Ditrichum scabri- 
folium Mitt., Catal. of Austral. Mosses, in Proe. Roy. Soc. Vict., 1882-83. 
Tas.: Archer, Oldfield, Bastow.’’ I have examined Mitten’s specimens at 
Kew, with the following results: “ Leptotrichum scabrifoliwm Archer et 
M., copse near West End rivulet, Tasmania, Mr. Archer,” Mitten in sched., 
is Ditrichum flexifolium—the “‘laxifoium” form. “ L. scabrifolium, ditches, 
Tasmania, Mr. Archer, 23 Aug.,”’ Mitten in sched., is Ditrichum elongatum 
(H. f. & W.). The other specimens so named in Hooker’s herbarium, “ Van 
Diemen’s Land, Fraser, H. 2739 and H. 2741,” are a mixture of D. u 
and D. flexifolium. Tt would appear that it was D. elongatum which gave 
rise to Mitten’s name scabrifolium, the identity with Hooker and Wilson’s 
plant being perhaps partly masked by the admixture of D. flexifolium. I 
have seen no specimens of Oldfield’s under that name, and I do not know 
the source of Bastow’s record. It is not included in his “ Tasmanian 
Mosses.”’ 
SAELANTA Lindb., Utkast not. grupp., p. 35 (1878). 
Lindberg created this genus for a very marked lant, by many authors 
retained in the genus Ditrichum. It has a wide distribution in the Northern 
Hemisphere, but, so far as I am aware, its sole station in the Southern 
Hemisphere, so far discovered, is that on Mount Ida, Otago, whence it was 
collected by Petrie, determined by Brotherus, and recorded by Beckett in a 
paper in Trans. N.Z. Inst., vol. 31, p. 426. The specimen from Mount Ida 
sent me by Rev. ©. H. Binstead ex herb. Beckett, which is in fruit, appears 
to agree exactly with our northern plant. As this species has not, I believe, 
been described in any work on New Zealand mosses, I give below a descrip- 
tion, taken from my “ Students’ Handbook of British Mosses.” 
