SPHAGNACEAE, 355 
9, A. acuattl R. Br. ter. in Trans. N.Z. Inst., xxv, p. 282 ee?) 
Syn. A. aa C.M. in Hedwig. XXXVii, 81 (1898). 
tall, x plant, bearing the same slags ea to A. australis 
that a aquatica does to A. nitida, and, n that case, of doubtful 
specifie a  Sertciaraiy I find no sp eka but the leaves are 
larger, often very broad below and flexuose-undulate, and more laxly 
dispose 
Original specimens of A. subfluitans at Kew, from Kelly’s Hiil, 
W tad. are exactly A. aquatilis; in fact it i s clear—locality, date 
and collector being the that it is unity Brown’s own type 
of A. “aipintalis being described over again under a new name! 
SPHAGNACEAE. 
SPHAGNUM Ehrh. 
The following treatment of eee is almost entirely taken 
from Warnstorf, ‘Sphagnaceae (in Engler, Das Pflanzenreich, Hef 
51, 1911). Comparing the species given in the Handbook with that 
work, S. cuspidatum is divided into eight species; S. subsecundum 
disappears from the New Zealand list; 8S. seit a r is divided 
into seven species; S. australe becomes a var. of S. antarcticum; and 
S. acutifolium also disappears. 
Of several of Warnstorf’s species I have only seen the deserip- 
tions, and am able to give no opinion of their value. <A eareful 
investigation of the New Zealand members of the genus in the light 
of the newer pane, but with an Tupac judgment brought 
to bear on it, would be a very valuable 
It should a ee that for an en study of the structure 
a - make transverse sections of the branch-leaves. 
aid the student if I give a Key to the Sections and Sub- 
ection as a hoe by Warnstorf. 
Sect. I. LITOPHLOEA Russ. 
nternal walls of the epidermal cells of stems and branches 
without spiral fibres; apex of branch leaves nearly always truncate 
and toothed. Inner walls of the hyaline cells of branch leaves 
smooth. 
Subsect. ACUTIFOLIA. 
Branch-leaves of medium size or small, lanceolate to ovate- 
lanceolate, when dry sometimes recurved, but otherwise little altered, 
not undulate, with a very narrow, entire border. Hyaline cells of 
branch leaves with large pores. Chlorophyll cells in transverse 
section either triangular or trapezioid, situated on inner face of leaf, 
enclosed at back or free on both surfaces. Colour variable, green 
in the only New Zealand species. 
