POTTIACEAE. 143 
s rather curious that among the various gatherings of this plant, 
ne of 
tl 
under different names in Brown’s herbarium, not one shows 
and there is no doubt that he relied on specimens from Hampe so named 
but not authentic. Hampe’s specimens in point of fact are all Australian, 
and none of them agree with the actual Tr. phaewm H. f. & W. 
e leaves of T. phaea are either elongate lingulate-lanceolate, or 
widely oblong-lanceolate, often spathulate, and this with the lax basal 
areolation and the fairly well developed peristome-tube indicates a 
ortula rather than Barbula. The colour (from which the specific 
name) is characteristic, ali the plants I have seen having a marked 
dark-brown, ustulate hue. R. Brown describes his 7. linearifolia as having 
a pellucid border to the leaves, ceasing near the apex; this I have seen, 
but very rarely, and doubt if it can be considered a specific character. The 
apex of the leaf is frequently hyaline-tipped, and the structure of the nerve 
is rather peculiar. It is strong and deeply coloured throughout its length, 
but there is often or usually a thin dorsal layer of pale or hyaline cells near the 
apex, so that when viewed in longitudinal profile—which is easily done, as 
the leaves are somewhat strongly carinate-concave—there appears a thin 
line of hyaline, usually somewhat irregular or rugulose cells, rather markedly 
contrasting with the brown colour of the body of the nerve. The upper 
cells are rather clear, arranged more or less regularly in longitudinal rows, 
finely papillose, 9-13 p in diameter ; the basal lax, rectangular, empty, and 
-pellucid, a number of rows of marginal cells being ch shorter and 
subquadrate ; in some leaves these rows preponderate, in’ others they 
are reduced to two or three. 
and South Islands. 
4. Tortula muralis (L.) Hedw., Fund. ii, 92 (1782). 
S 
: er. 
op. cit., p. 403. T. Hutchinsonii R. Br. ter., op. cit., vol. 35, 
. 339. 
This well-known and almost cosmopolitan species scarcely needs 
description—the small dense tufts, oblong leaves, green, not reddish, with 
strongly recurved margins and long white hair-point, taken in conjunction 
with the small size and the short peristome-tube, are unlike any other New 
Zealand plant. 
The three first-named plants of Brown’s are in his herbarium, and are 
certainly 7. muralis ; no specimens are present of 7. Hutchinsonw, but I 
think no one studying the description and figures in the volume cited could 
