314 BRYOLOGY OF NEW ZEALAND. 
alar cells. In the very slender forms these characters tend to dis- 
appear, and it is then very difficult to distingui serpens, 
hich ver is autokcous and generally fertile, while the present 
dioicous plant is rarely found in fruit. A also is usual 
Hypnum serpens var. B., belong to these forms, and are referable 
to ata ois odes. 
Vv ichodes (Brid.) (H. trichodes Brid. Sp. M. ii, 236). 
Extremely gio r, filiform, with minute leaves; scarcely distinguish- 
serpens except by the shorter cells ‘and distinctly stouter 
nerve, reaching higher in the leaf. 
The andbo ok r records A. filicinum only from the Aucklands; I 
have it sere from Hawkes Bay, Rotorua and Taupo, in the 
North Island, and from an unnamed locality in the South IL. the 
last three catherings being by Berggren. 
SciaromiuM Mitt. Muse. Austr.-amer., in Journ. Linn Soc., Bot., xii, 
571 (1869). 
A genus of aquatic, almost eins bie. mosses, distinguished 
by the very stout nerve, and more less differentiated, often 
thickened border. In the New ene species the border is weak 
and may at times be easily overlooked, but in some leaves at least 
it will be found well marked. 
Sciaromium a Broth. in Oefv. af Finska Vet.-Soe. Foerh. xl, 
189 (1898). 
Plants floating in water, bright or dull green, up to 9 em. in 
length, more or less flexuose and flaccid, much branched. Leaves 
spreading i in all directions or very slightly hononistloes 2 mm. long 
ather more, cordate-ovate, abruptly acuminate and acute; nerve 
ey stout, usually reaching to or nearly to apex, sometimes becoming 
confluent with the bor der and slightly exeurrent ; cells very narrow, 
3-4 
spicuous ; entire or faintly sinuose or irregular; eg its slighty 
hair at angles but very little differentiated. Dioicous. Fruit 
u 
Fae South I., N.E. Valley, an Southland sae ae Otago 
(T. W. N. Becket tt) ; ea i; Ota a (S. meeeeer 277 
Brotherus describes the Cee as ‘* eric: cone dttnee 
but if technically correct “this Sede is I think rather misle se 
ing, as most of the leaves are quite entire, and the denticulations 
when present scarcely amount to more than a slight sinuosity. 
The stout nerve, the short and wide, not or searcely faleate 
leaves. me the presence of a border, will separate it at once from 
others of the Amblystegiaceae. The only plants likely to be confused 
with it are certain aquatic forms of the Hypnodendraceae viz. 
Sciadocladus Kerrii and Hypnodendron marginatum; both of these 
have narrower, ovate-lanceolate leaves, a much oe nerve, 
shorter and wider cells, and a distinetly toothed margi 
