prs 
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se pad. ‘as € 
Muscti Exorici:.—Browniani. 
GYMNOSTOMUM LEPTOSTOMUM., 
Gymnostomum caule ceespitoso subsimplice, foliis oblon- 
gis obtusissimis integerrimis nervosis a ss 
terminatis, capsula ovata erecta. (Tas. CLXIX.) 
Leptostomum erectum. Brown in Linn. rece v. 10. 
p. 320. 
Has. Nove Hollandie ora orientalis, extra tropicum, in rupes. 
prope fluviorum ripas in regione montana, ad fluvios Hawkes- 
bury et Grose. D. R. Brown 
Caules densissime cespitosi, inferne tomento ferrugineo obsiti, su- 
perne foliosi. Folia parva, lete viridia, sub lente punctulata, 
dense imbricata, erecta, siccitate tortilia, oblonga, obtusissi- 
‘Ma, VIX concava, marginibus integerrimis recurvis, nervo va-. 
lido ultra apicem in pilum breviusculum flexuosum producto. 
_instructa, Perichetialia angustiora, longiora, marginibus ma- 
gis reeurvis. Se/a unciam longa, flavescens. Capsula erecta,, 
ovata, fusca, ore paululum contracto, intus membrana suberec- 
ta pallide flavescens, margine dentata, longitudinaliter lineata, 
hineis Oe ee has lineis transversalibus. Oper- 
cudum eho: hemisphericum / 
rr 
“he eing possessed of better specimens of this than of the other 
species of Leptostomum of Mr. Brown, I was enabled the more 
satisfactorily to examine its peristome; and I am clear, in this 
species at least, that it is divided by longitudinal and nearly equi- 
distant lines; an indication of teeth; and indeed the membranous 
substance betw een them at the extremity is produced more or less 
in every instancé, and is for its whole length transversely striated. 
This structure is the more important, because it precisely agrees: 
with a sketch which I made some years ago of the peristome of 
Hedwig’s Bryum macrocarpum in Mr, Turner’s herbarium; and. 
it has not escaped the observation of Mr. Brown, that that plant 
is very closely allied to his Leptostomum, and that Hedwig’s figure 
of the peristome is probably very incorrect. 
To the present species in particular, Bryuwm macrocarpum is | 
certainly in other respects very closely allied, particularly in the 
upright capsules and the great revolution of the margins of the 
leaves. There is, — a very peculiar habit in all the Lepto- 
~ stoma of Mr. Brown 
Fig. 1, tuft of plan . size. Fig. 2, plant. Fig. 3, upper side = os 
leaf. Fig. "% caer cle ‘of di fk: Fig. 5, pericheetium. Fig. 6, leaf pl 
Fig. af capsule. Fig..8, operculum. Fig. 9, portion of the peris 
Ya IL. 
