84 BRYOLOGY OF NEW ZEALAND. 
The presence or absence of a hair-point to the leaves is usually considered 
an important character, and might be supposed to afford a simple test ; 
yet in two or three species I find it exceedingly difficult to know whether 
they should be placed in the section Atrichi or in Trichophylli! The 
width of the nerve is a valuable feature, but within certain limits it may 
vary considerably, as between different leaves of the same stem. The alar 
cells may form well-defined auricles or may be quite absent; but, on the 
other hand, they may be so indeterminate that it is difficult to know how 
to class the leaf. And again, the habit of the plant may vary immensely, 
and it becomes very difficult at times to know how much weight to place 
upon this character. That the plants are for the most part found sterile 
is of the less sapere since the fruit rarely gives any distinctive 
characters of value. This being the case, it is most difficult to draw up a 
satisfactory key. The following attempt may, however, be of some 
naobee al help. 
R. Brown has dese ribed fifteen new species of Campylopus in Trans. 
N.Z. Inst., "ol ; but none of these can stand. This is to be explained, 
no doubt, ‘by the fact that with Brown it was the habit and morphological 
characters that counted, rather than the structural and microscopical ; 
and in Campylopus differences in habit, colour, &c., really stand for very 
description of the areolation is, indeed, confined to “ oblong,” ‘small, 
i quadrate,”’ when it is mentioned. at all, and the nerve is uncom- 
promisingly either “broad” or “narrow ost of these species are 
preserved in his herbarium, and unfortunately ed can all, to a certainty, 
be referred to one or other of the described species 
Key To THE SPECIEs, 
Subgenus I. Campyxorus sensu stricto Limpr. 
Nerve ne pee with dorsal stereids only, the cells above the Deuter series 
in one row only, lax, and often (Reet Sart larger than the Deuter 
A. Arricut. Leaves not ending in a distinct hyaline (C. capillatus and 
C. torquatus may have the tip of the subula waievcean 3 or r hyaline. ) 
1. Leaf-apex capillary. 
a. Calyptra entire at base. 
* Supra-alar cells wide and short ; nerve about half width ' base 
. Holomitrium. 
** Supra-alar cells linear ; nerve 228% one-third width of ‘ees or less 
ll. nudus. 
b. Calyptra fringed at 
* Stem tall, interruptedly comose ; alar cells fairly well marked 
3. capillatus. 
** Stem rarely more than 1-1} in. high, scarcely comose ; alar eo none 
2. torquatus. 
. (rarely with a short h 
_ a, Nerve much more than half width of base, alar cells inconspicuous 
4. bicolor. 
ee 5. Kirkii. 
2. Leaf subula rigid, not ¢ ee usually ending abruptly and subcucullate 
air). 
6. Nerve less than half width of base, alar cells large... 
