AMBLYSTEGIACEAE, 313 
have not seen the typical form from New Zealand. The plants 
referred to Hypnum serpens var. f. in the dang ate oe to A. 
fiicinum var. trichodes. Colenso’s plant from s Bay is a 
sterile, more robust moss than the usual forms, niet esa rather 
divergent, ees BE OPT leaves and long nerve, coming very 
close to some Eur and North American plants usually referred 
to A. epee oO pees It is a plant that requires further study. 
2. Amblystegium riparium (L.) Bry. eur. fase. 55-56 (1853). 
Syn. Hypnum riparium Linn. Sp. Pl. p. 1129 (1753). 
much larger plant than either of the other species, usually 
. more or edi aquatic, with soft, irregular, straggling, more or less 
complanate branches, the leaves rather widely divergent, 2.5 to 3.5 
mm. long, of a rather dull, olive green, the older ones often very 
dark, from a short, decurrent, ovate base elongate lanceolate, finely 
subulate, quite entire; nerve r reaching to about two-thirds the length 
of the leaf. Cells narrow and elongate, linear aeaaay. 8-12 
times as long as wide or even longer, becoming gradually laxer 
towards base, but not forming distinct auricles or with any clearly 
differentiated alar cells. 
Autoicous. Seta short; capsule curv ed. 
A. riparium is mentioned in the Fl. N.Z. ii, 109, and in Handb. 
N.Z. Fl., p. 482, as recorded from Hawkes Bay, but with some 
degree of doubt. It has not since been recorded, but I have received 
it from three stations, all in the North L., and its Poeciien in New 
Zealand is sao established. The localities are as follow ya 
ereek, Hunterville, Marton, coll. Chas. J. Burgess, two ee ecimen: s, 
26 and ‘the latter in fruit, the a an aquatic, floating form 
with large, spreading leaves; Rotorua, Tarawera, coll. Berggren 
(2575); and North Auckland, coll. H. B. Matthews, comm. G. O. K. 
Sainsbury (No. 209), this fiir a similar form to No. 26 mentioned 
above 
A. riparium is very different from the other two species, and 
] 
confu i 
Drepanocladus aduncus, and some forms of that cannot be separated 
without microscopical examination. The very clearly defined auricles 
of the Drepanocladus, however, will always distinguish it. 
3. Amblystegium filicinum (L.) De Not., Cronaca, ii, 25 (1867).: 
Syn. Hypnum filicinum Linn., Sp. PL, p. 1125; Handb. N.Z. 
FL. op. 42.” ff s baabigitegtan P lickmam Broth. in 
Engl. @ Prantl, Pflanzenfam., Musci, ii, 1028. 
The typical plant is a fairly robust one, with more or less erect, 
adiculose stems, shortly pinnately branch ed; it varies, however, so 
greatly that this habit cannot be decaune d upon — all the 
Zealand plants I have seen are more or less scm or very slender 
1 for il 
known by the stout nerve, often pereurrent or excurrent, the short 
and wide cells, and the decurrent group of larger, pellucid or orange 
