ioi 
it and decided it could not be Torreyanum Sulliv., which is dis¬ 
tinguished from *S\ cuspid alum R. & W. by having the chlorophyllose 
cells of the branch leaves in the lower half of the branch leaves 
completed) 7 enclosed on the inner surface by the strongly convex 
hyaline cells, which are united together for some distance, as in 
S. pulchrum Warnst., and S. obliisum VVarnst. 
S. cuspidatum R. & W., as also S. fallax Warnst., S. monocladum 
Warnst. and -S', trinitense C. M. has on the other hand the 
chlorophyllose cells everywhere trapezoid or rectangular and free 
on both surfaces of the leaf- According to this character our 
species must belong to the latter group of species and cannot be 
Torreyanum. Dr. Braithwaite’s description, p. 85, “ Sphagna, 
is, according to Warnstorf’s description of an original specimen 
of Sullivant’s, incorrect in two points : (1) colour was grey-green 
not reddish-brown, (2) pores were not very numerous but agreed 
exactly with S. cuspidatum Warnst., Eur. Torf. 1881 p. 74. 
Having examined three different specimens of Sullivant’s in Brit. 
Mus., all agree with Warnstorf’s diagnosis in the important 
character of the position of the chlorophyllous cells and also in 
the colour and pore structure. None are reddish-brown ; in two, 
pore structure agrees with A. cuspidatum. In the third, pores 
on b. leaves on inner surface are rather more numerous but are 
not minute (Braith.) but rather large, round and non-bordered. 
Warnstorf does not consider the degree of serration to warrant its 
inclusion under S. trinitense but names it as above. A. trinitense 
is a recent revival of W r arnstorf, and includes all the forms of 
S. cuspidatum with serrulate branch leaves. It is as large and as 
variable a ‘ Formenreihe’ as S. cuspidatum. The degree of 
serrulation is perhaps not a sufficiently important character on 
which to found a species, but to whichever form the present plant 
may be referred it cannot be S. Torreyanum Sulliv.”—E. C. H. 
“Mr. Horrell’s ‘Notes on Sphagna’ are very interesting and 
instructive. He has established the non-identity of Mr. Ingham’s 
plant w r ith S. Torreyanum Sull. One may perhaps be permitted to 
exclaim against the establishment of a species on the sole character 
of the serrulate leaves, especially when its author excludes a plant 
from it on the ground that the degree of serration is insufficient to 
warrant its inclusion.”—H. N. D. 
“ I have brought all my sphagna up to the new system with 
Mr. Horrell’s valuable help, and must say there is a good deal to 
be said for it. The Warnstorfian system is based upon 
morphological and therefore natural characters, and I have been 
much pleased to find that the habit of the Sphagnum in the 
majority of cases is correlated with the morphological characters 
— W. Ingham. 
“ A valuable help to the understanding of Warnstorf’s system has 
just appeared (1901) in Part (lieferung) 207 of Engler & Prantl s 
Pflanzenfamilien 3/-, which contains illustrations of sections of the 
cell structure of all the principal divisions of Sphagna. C. H. \\. 
