POTTIACEAE. 1k3 
The description of C. Miiller’s Trich. sciophilum leaves no doubt in my 
mind that he is describing one or other of the forms of this species (the 
peristome was not found). 
I have not much hesitation in referring ie — three species of Brown’s 
published in Trans. N.Z. Inst., vol. 26, but cimens are not available 
the matter cannot be definitely settled. G. abdaies of the same author 
may quite probably belong here also 
The plant figuring as W. crispula Hedw. in R. Brown’s herbarium, and 
described and figured by him in the paper in Trans. N.Z. Inst., vol. 31, 
belongs to W. wridula. The plant so called in the Handb. N.Z. Fl., on the 
other hand, refers to the — erispula of Hedw. Sp. M. (Dicranoweisia 
crispula), and is Dier. antaret 
A plant of Hooker’s colaciie, ‘“ H. 305, N. Zealand,’ in Herb. Wils., 
also belongs to the var. gymnostoma 
have examined the specimen of “\Prichostomum mutabile, N. Zd., Colenso, 
21446,” in Wilson’s herbarium, on which Wilson has noted ‘ ‘ Weisia allied 
to controversa but different.” It is a tall, robust plant, with stems 1-5cm. 
high, leaves large and wide, margin erect in the lower leaves, incurved in 
the upper; in size about equal to those of W. mucronata B. + OF 
Hymenostomum tortile B. & e sporophyte appears to agree exactly 
with W. viridula ; Wilson has sketched the peristome-teeth as short and 
very narrow. It is certainly not Trich. mutabile, and I think may safely 
be referred here. Wilson has remarked that the imperfect peristome renders 
it difficult to distinguish from Gym. tortile (Hymenostomum tortile B. & 8.), 
which alone would indicate its position as ben in Weisia. Forms of 
W. viridula with wide leaves are not rare in Europe, but they are usually 
associated with short, wide, truncated peristome-teeth (var. amblyodon 
B. &.8.). I have, however, seen specimens of var. densifolia B. & 8. which 
differed very little from the New Zealand plant in question, and it might, 
I think, almost be referred to that variety ; ; but that was desc cribed by the 
more than one of the named varieties, without being quite referable to any. 
viridula is no doubt common in New Zealand. 
2. Weisia Weymouthii R. Br. ter. in Trans. N.Z. Inst., vol. 31, p. 439, 
t. 38 (1899), [nec Weisia Weymouthii C. M. e Rodway, Tasman. 
Bryophyta, Mosses, i 19 (1914)]. 
? Gymnostomum angustatum Knight in Trans. N.Z. Inst., vol. 7, 
p. 355 (1875). " Tvsshcttamates Cockaynii, P. p. R. Br. ter., Op. cit., 
Searelliai R. Br. ter., op. cit., vol. 35, p. "329 (1902). 
I feel some doubt as to the position of this plant, but am inclined to 
let it stand in Weisia. The uncertainty arises partly from the great varia- 
bility of several characters, partly from the imperfection of the material 
available, especially as regards the peristome. The type specimen in 
R. Brown’s herbarium shows sca arcely a trace of ig but what there is 
seems to be clearly Weisioid. That of Trichostomum ym contains a 
ft) r with a few stems of a moss which I take 
to be identical with W. Weymouthii, but the peristome-teeth are longer 
and narrower, and shortly filiform above, while the leaf-structure shows 
