304 BRYOLOGY OF NEW ZEALAND. 
to the last, but with the branches less densely ramulose, the rameal 
leaves much mo de aad: wae! hag leaves than the ramuline ones; 
the latter alee vie n T. laeviusculum, decidedly more longly and 
narrowly tapering, with a ihsitier nerve, not projecting at back, 
though frequently periamieons in a minute, spiculose point. It may 
be hoped that it will be rediscovered in sufficient quantity to allow 
of a Sibi idea of it characters. 
HYPNUM. 
The species of the genus Hypnum, as treated in the older works, 
have been distributed in recent times not only over many genera, 
but even among several Families. It may be convenient to give 
here some guidance as to the groups under which the New Zealand 
species are to be sought; several genera (Echinodium, Lembophy a 
Thuidium) having been already dealt with. The following Key w 
assist towards this. 
eed tag Sebi gle 2 Un |. Meese g Sue rC nt ORR Se RTE EETRE Sitecss SBS sagt ames One rivet ataser a oma 2 
ToMerve OOF; MOUDIG nk gh ee ae nn Se ee 4 
( eid Wit 8 ION DERI ae ee i ee ee Brachytheciacene 
2 (excluding 
\ Brachythecium) 
Lid conical or mamillate 
Seta more or less rough. ..... ee. dee = haa Beat focion 
3 eget 
: B. salebrosum) 
Sots: RINGOER Ss ee er a Amblystegiaceae 
Alar cells large, ‘inflated, often orange; lid with 
4 { em, lone heal oe i ee Sematophyllaceae 
EA yet Oh eee Ora a ae panes ee sa 5 
aes es more or: less Goietiiace.” very rarely 
5 faleate-secund ois Megane en tee oe Plagiothecieae 
Leaves more or less faleate .... ___...... 
Ege inclined, more or less oblong, asym- 
6 Pi ee ee edo a a Stereodonteae 
Capel usually pendulous, short and oe 
symmetric, usually urceolate when dry .... Ectropothecieae 
The above Key may help to BS the Hypnaceous species 
remaining to be dealt with; but it is almost impossible to do this 
form of a key with any degree of completeness; certain species 
refusing to conform to what are the usual characters of a genus, and 
the genera themselves being based on a combination of characters 
very sangre’ be definition ; so that the student who has some acquaint- 
ance with the groups may often be able at once to refer a species 
to its genus, wis Lo find it very difficult to give the exact grounds 
for such a refere 
T hav intaitied ss some extent the treatment of Brotherus—to 
a. I have Le feat soe part adhered—in the direction of what 
ewhat —— and simpler classification; 
Seupiaibe e he Pianetioches ja 
It may be helpful to give eae by side the divisions of Hypnum 
as used in the Handbook of the N.Z. Flora and those adopted ‘are 
