290 MR. A. D. COTTON ON 
In the Kew Herbarium there are some specimens of Derbesia 
Lamourouxii collected at Nice and these are richly infected with 
Endoderma. The endophyte in the specimens agrees exactly 
with that described by Reinke, and, like his plants, is without 
fruits. A special search was made for these, but without 
success; even where the endophyte was quite old and had formed 
an almost pseudoparenchymatous mass, no trace of fruit could 
be seen. The absence of fruit in the endophyte in Derbesia is 
unfortunate, as it renders absolute certainty as to the identity of 
Reinke's plant impossible. 
A comparison of the vegetative character of the endophyte 
in Derbesia with that of Nitophyllum Hillie shows a close 
agreement in form and structure ; and sufficient, it is thought, 
to justify the opinions of previous authors (5), (6), that the same 
plant is in question in both cases. For the present, therefore, 
the writer is content to regard the plant, so frequently invading 
the tissues of Nitophyllum, as the same species as that described 
by Reinke. In view of any possible discoveries in the future of 
the fruit of the endophyte in Derbesia, he would, however, like 
to distinguish the plant he has examined by naming it Endoderma 
viride (Rke.), Lagerh., forma Nitophylli. 
In Nitophyllum and allied Floridee, Hndoderma frequently 
forms large spreading patches which may be readily detected at 
a glance. N. Hillie, which is found in deep water on the south 
coast of Britain, is particularly liable to infection; indeed it is 
rare to find any but very young specimens which do not show 
the filaments under the microscope, even though the green 
blotches be not visible to the naked eye. In this species of 
itophyllum the green spots or blotches are often of large size, 
and in old, badly infected plants the whole lamina appears green. 
In other species quite a different appearance is presented by the 
Endoderma, but this will be referred to later. 
In the summer and autumn months the fruit-bodies may be 
found abundantly in N. Hillie in the green blotches referred to, 
and even in the portions of the Zndoderma plants that are 
apparently quite young; a fact which is noticeable at once, 
because in other hosts, e. g. Delesseria, the fruit-bodies are much 
more difficult to obtain. 
Under a low power of the microscope the bright green fila- 
ments are seen following the outlines of the cells; a section 
