DICRANACBAB. 41 
Euditrichum Broth. Capsule mostly asymmetric, narrow at the mouth, 
at times symmetric. Peristome teeth long, divided to base, golden, reddish- 
yellow or reddish-brown, rarely hyaline above. 
The characters of peristome and capsule form are, however, not corre- 
lated. Thus several of the species of Huditrichum have the capsule erect 
and symmetrical; while D. punctulatum Mitt. has the peristome of Eudi- 
trichum, though to place it under that subgenus would separate it from its 
nearest relations, D. strictum and D. elongatum. Again, the peristome of 
D. m is of an intermediate character, the teeth being undivided, 
but brown in colour, not pale or hyaline. I have, therefore, not retained 
the subdivision here. 
1. Ditrichum elongatum (H. f. & W.) Mitt. in Trans. & Proce. Roy. Soe. 
Victoria, 1882, p. 51. [Plate V; fig. 3.] 
yn. Trichostomum elongatum H. f. & W., Fl. Tasman., 2, 176, t. 173 
(1860), and Handb. N.Z. FIL. p. 417, Cynont todium Lees um 
Mitt., M. Austro-amer., p. 43. Leptotrichum elongatum Jaeg., 
Adumbr., 1, 230. 
Ditrichum elongatum, D. strictum, D. punctulatum, and Distichium capil 
laceum form a group of plants which with quite clearly marked differences 
in the fruiting characters manifest a remarkable similarity in vegetative 
morphology and structure. I have endeavoured to elucidate the characters 
of this perplexing group in n deseribing D. punctulatum below. 
The capsule, however, of ngatum shows considerable difference 
from all the other species. In D. ese oa it is pale or dull brown, not 
dark reddish-brown as in D. strictum and D. punctulatum ; it is larger and 
longer, exactly cylindrical, not at all narrowed above, the mouth if anything, 
indeed, a little widened, with a dark thickened rim; the lid is distinctly 
stouter and the seta always markedly paler above than. below. The peri- 
stome, also, is shorter, the teeth single or slightly connected here and there 
in pairs, and less highly papillose. 
elongatum occurs m in Chile, Australia, and Tasmania, as well as in 
New Zealand. Ihave it from both North and South Islands. 
2. Ditrichum strictum Hampe in Linn., 1867, p. 181. [Plate V, fig. 4.] 
Syn. Lophiodon strictus H. f. & W. in Lond. Journ. Bot., 1844, p. ap 
and Fl. Anta ne 1, 130, t. lix. Leptotrichum australe Mitt. 
Journ. wer (Bot.), 1859, p. 66. Trichostomum ey a 
H,,-4; pee pain 2, 177, and Handb. N.Z. Fl., p. 417. 
See australe Mitt. in Trans. & Proc. Roy. Soc. Victons, 
1882, p. 51. Cynontodium australe Mitt., M. Tats -amer,, p. 42. 
Didymodon longsfoliue.H, fd W Hi. Antaret. 2, 408. 
The confusion between this plant, Ditrichum punctulatum Mitt., and 
Distichium capillaceum has been very great, and it is by no means certain 
that the above references—given in Paris’s Index—apply, so far as they 
refer to New Zealand plants, to D. strictum; it is quite possible that some 
of them should be transferred, at any rate pro parte, to D. punctulatum 
eee — species I have endeavoured to point out oe Setcisicking 
¢ 
ie “ar not seen any actual New Zealand specimens of the true D. strictum. 
None appear to exist in Hooker’s herbarium at Kew. It might be assumed 
