28 
agreed fairly well; moreover Saccardo has already recorded a 
orm of “C. leucosperma”’ on Acer campestre. But, when the 
branches were kept for some days, the whole of the tendrils 
turned yellow (almost amber), with just that hint of turbidity 
which seems to be characteristic of C. ambiens, and it became 
obvious that no distinction worth having could be drawn between 
this form and what had been already accepted as a form of 
C. ambiens on the same host. This conclusion is strengthened 
by Saccardo’s remark, of his specimens on Acer (p. 268) “ basidia 
verticillato-ramosa, longiuscula.” Other specimens previously 
called leucosperma on Prunus Laurocerasus were found to be 
similarly capable of falling under the inclusive C. ambiens, and 
for the same reasons. Original examples of Fries (Scler. Suec. 
no. 156) offer nothing that contradicts this idea. 
Very possibly C. hyalosperma could be treated in a similar 
way, and in like manner C. guttifera will probably turn out to 
be merely a congeries of specimens in which, owing to the weather 
conditions, the gelatinous contents issued in the form of a globule 
instead of a tendril 
C. microspora Rab. (Naemospora microspora Cord.) stands on 
a different basis: it seems to be merely a mistake. Probably 
Corda had before him one of those cases, such as are to be met 
with, where the pustules of a Cytospora and of a Naemospora 
grew so close together that they merged into one. I have a 
twig of Crataegus Oxyacantha in which this is clearly shown, the 
dark stroma of C. Oxyacanthae penetrating into, and even being 
surrounded by, the bright orange stroma of N. crocea (Bon.) 
which is common on that host. The great similarity of the 
spores, in size, shape, and manner of growth, would help to 
confirm the illusion. NV. microspora Cord. (Ic. iii. 26, f. 69) is 
in my opinion a “species” compounded of two fungi which 
accidentally grew merged together. The description of C. micro- 
spora previously given (p. 18) is that of Diedicke, and may 
represent a species but, I think, it is certainly not that of 
Corda, Desmazieres or Rabenhorst. 
InpEx oF Hosts.- 
CONIFERAE. 
C. Abietis C. Pinastri 
C. Curreyi C. Pini 
C. Friesit Var. OS 
CUPULIFERAE 
Quercus. Castanea 
ambiens C. ambiens 
. ceratophora C. ceratophor 
C. guttifera . 
C. intermedia Corylus 
C. ambiens 
Alnus C. Fuckelii 
C. occulta 
