120 Salmon. — A Monograph of 
Dr. Geheeb’s and Muller’s herbaria, and with the examples 
at Kew and the British Museum, I have found that the two 
are certainly identical. 
At first sight the Madagascan plant appears to be specifi- 
cally distinct from S. erythrodontus in the following characters: 
the leaves are more distant and are patent or patulous when 
moist, not erecto-patent ; they are wider, and as regards the 
upper leaves shorter ; the excurrent nerve is frequently shorter 
and the limb also frequently ceases at some distance below 
the apex of the leaf ; finally, the areolation of the leaf is 
distinctly laxer. I can find no difference in the fruiting 
characters — the calyptra, operculum, capsule, and peristome 
of the Madagascan plant agreeing exactly with those of 
South American examples of 5. erythrodontus. The male 
inflorescence is also the same in both plants. The vegetative 
characters noted above, however, viz. the more distant, broader, 
patent or patulous leaves with the limb very narrow or absent 
above, and the larger leaf-cells are quite constant, and might 
be considered of sufficient importance to give specific rank to 
5. Rritenbergii if there were no other forms showing inter- 
mediate characters to be considered. There exist, however, 
two other plants which give important evidence on the ques- 
tion of the affinity of the Madagascan plant. These are the 
South American plant which I have described above as 
5. erythrodontus var. intermedins , and a plant from Central 
Madagascar which has borne for some time the ms. name of 
S'. Parkeri , Mitt. 
The var. intermedins occurs in the Kew Herbarium mixed 
with typical S. erythrodontus in Spruce’s ‘ Muse. Amazon, et 
And., nr. 141 b.’ This plant differs from the type in possessing 
exactly the habit of the Madagascan plant, i. e. the leaves are 
more distant and wider ; the upper and perichaetial ones are 
not long and narrow ; and all the leaves are patent or patulous 
when moist ; the leaf-cells, however, are distinctly smaller 
than those found in S. Rutenbergii , although occasionally 
a close approach is made. The limb of the leaf in the var. 
intermedins is frequently lost some way below the apex, and 
