GRIMMIACEAE. Lit 
dense forms have the capsules sometimes immersed; in these cases it is 
extremely difficult to teas from O. cyathiforme, especially as in these cases 
the leaves are often subobtuse ; but the hairy calyptra, if present, will at 
once distinguish it, while we leaves are in most forms much more acute than 
in that species. The calyptra is frequently, perhaps normally, smooth 
below and hairy baa near the tip; it is usually pale below, and always 
reddish at the apex 
The e Susocians cells are distinct in being arranged in very regular 
vertical rows, with the he eins Mn ee, Ere while the 
transverse walls are very narrow and inconspicuous. The stomata are 
superficial. The peristome- teeth are pale on deoietonlaviln: set frequently 
brown when fully mature ; the processes filiform but rather stout, pale or 
brown, finely papillose. 
O. hortense is probably one of the most common species ; I have it from 
numerous localities in both Islands. 
9. Orthotrichum eer eeenn C. M. & Beckett in Trans. N.Z. Inst., 
vol. 25, p. 291, t. 36 (1892). 
Syn. 0. leiolecythis C. M. in Hedwig., xxxvii, p. 140 (1897). 
O. subleiolecythis Par. Ind. ‘ing p. 260. O. acuminatum 
R. Br. ter. in Trans. N.Z. , vol. 27, p, 434. O. obesum 
R. Br. ter., op. cit., p. 435. 
This species is at once distinguished from all the preceding by the 
quite immersed, smooth capsule, which is turgidly oblong-oval, narrower 
yp 
densely pilose, undulate-lobed at the base. The exothecium cells are 
very thin-walled, short and wide; the stomata in the upper or lower part 
of the capsule ; the peristome pale, reflexed when dry, the processes broad, 
ith a median line and irregular margins. The capsules persist for 
several years, becoming lateral, but, being immersed, are not conspicuous 
in O. Beckettii. Beckett describes the habit as peculiar, the stems being 
prostrate and almost creeping, as in Macromitrium, so as to form large, 
ar patches. 
rom the description I think Kees can be no doubt that 0. leiolecythis 
C. M (nec O. leiolecythis C. M. i ov. Giorn. Bot. ital., 1896, » 107) is 
to be referred here. C. Mueller’s cea of the two species* do not 
suggest any character of importance e beyond the calyptra—densely hairy 
in O. graphiomitrium, sparsely hairy in O. leiolecythis. And he does not in 
his notes suggest any further difference beyond this calyptra character, 
O. leiolecythis. 1 have seen no specimen of O. leiolecythis ; but I have Pe 
with the calyptra ia densely pilose, of age the stems are more 
less geniculate, while a specimen collected by Mr. Petrie in Leith Valley, 
Dunedin, has the spt only sparsely sila while the stems are not 
markedly geniculate. 
ait 
* Beckett published O. graphiomitrium in the Trans. N.Z. Inst. in 1892; im 1898 
C. Mueller described it as new in Hedwigia, Arica overlooking the previous 
Sg IME Dee: A IE TE EEN TE ic Sir ES ace WT tl Dye 
publication. 
