POTTIACEAE. 115 
cifolia (R. Br. ter.) Dixon. Areolatio magis obscura, e 
caliebe ods Spancnbus. subopacis instructa ; folia plerumqve erecto- 
patentia, vix recurvata. 
Syn. Dicranum lancifolium R. Br. ter. Rei? N.Z. Inst., vol. 29, 
p. 458 (1896). D. kowaiense R. Br. ter., oe cit., vol. 35, . 330 
(1902). ceenonemen Brotherusii R. Be ter., op. cit., vol. 35, 
27 (1902). 
The name lancifolium is a most unsuitable one for the variety, but 
marked give the plant a very different appearance from the normal 
forms; but intermediate states occur, and in a few cases these are not 
easy to place. 
The peristome in W. We ymouthii shows a very considerable range. 
Usually, it appears, the teeth are pale, fragmentary, very irregula 2s 
divided and connected, and smooth or very finely papillose. a othe 
times they are yellow, ‘and rather coarsely granulate ; in one plan 
which seems to belong to the variety, they are fairly aus alee atvided 
into two long filiform crura. 
The typical form and the variety. occur in Brown’s herbarium under 
numerous names and from various localities. I have also received it from 
G. Webster (No.. ag collected by 8. Chadwick at Waikopiro, 
Hawke’ s Bay, North Islan 
EXCLUDED SPECIES. 
. acu bifoli a R. Br. ter. in Trans. N.Z. Inst., vol. 31, p. 438 = Barbula 
hie dese (Hook. & Grev.), p.p., and Gymnostomum caleareum var. 
longifolium p.p. 
Ae aise R. Br. ter., op. cit., p. 439= Gym. calcareum var. 
longifolium. 
W. Petriei R. Br. ter., op. cit., p. 440 = Eucladium irroratum. 
W. Webbii R. Br. ter., op. cit., p. 440 = Dicranoweisia antarctica. 
W. Brotherusii R. Br. ter., op. “cit., p. 441 = Pseudodistichium Brotherusii. 
W. kaikouriensis R. Br. ter., op. cit., vol. 35, p. 328. Almost certainly 
= Barb. australasiae 
W. crispula Hedw. (Handb. oh Z. Fl., p. 404) = Dicranoweisia antarctica, 
W. irrorata Mitt. = Eucladiu 
W. contecta H. f. & W. = Bhi india 
W. rufa Stirt. J a in Trans. NZ. Inst., vol. 6, p. 210) is 
apparently a nomen nud 
GymNnostomum Hedw. 
This genus, which at one time formed the dumping-ground of seroanatd 
every gymnostomous moss, has now been reduced until, under Brotherus 
system, it retains only six species. It differs from gmenostomum in ‘not 
having the os closed ae an epiphragm ; from ostomous 
forms of Weisia in the flat-margined leaves, not much crisped when dry, 
with nerve ee below the apex. The species are generally inhabitants - 
of wet calcareous rocks. 
