354 
further investigation, to be more widely spread and more definite 
(just as is the connection of Phomopsis with Diaporthe) the 
result would be of considerable help in practical pathological 
studies. It may be remarked, in passing, that in this case the 
genus Gloeosporium would have to be subdivided into several 
genera, a process indeed which has been already started. 
CEUTHOSPORA. 
Pyenidia or stromata of two kinds: (1) like those of Cytospora, 
but mostly unilocular only; (2) larger, flatter, more coriaceous, 
usually pseudolocellate within; immersed, then erumpent by a 
conico-truncate neck or more than one, often surmounted by a 
dark-brown leathery disc. Spores usually cylindrical, nearly or 
quite straight, hyaline, continuous, distinctly pedicellate, occa- 
sionally issuing in a tendril. 
e basis on which I place this genus is the possession of 
two kinds of pyenidia—a smaller one resembling a Phoma or 
a unilocular Cytospora; and a larger one, having much the 
character of.a sclerotium, and acting as a resting stage that 
can persist for several years, but sooner or later producing spores 
identical in form with those of the smaller pycnidia. In some 
of the species this occurrence of the two kinds is so obvious 
that it cannot be unnoticed, but in C. phacidioides the smaller 
pycnidia are apparently rather uncommon. Even in that 
species, however, they can be found at times, in close company 
with the larger ones on the same leaves and having exactly 
the same kind, of spores and sporophores. It will be seen that 
some of these have long been known and described under 
different names, e.g., Phoma cylindrospora on Vinca, Hedera, 
Euonymus, etc., and in at any rate some cases Phoma leucostigma. 
Many specimens (perhaps most) that are called Cytospora foliicola 
belong to the same category. It will be seen that the species 
of Ceuthospora delight in thick and coriaceous leaves, such as 
those of Hedera, Euonymus and Vinca, the very plants on which 
Cylospora foliicola, Macrophoma cylindrospora and Phoma leuco- 
stigma are wont to be recorded. 
Ceuthospora Euonymi Grove, in Journ. Bot. 1916, p. 190. Cyto- 
spora foliicola Lib. p.p. 
Pycnidia or stromata immersed, amphigenous, of two kinds : 
(1) unilocular, about 0°25 mm. diam., densely crowded or 
dise often tinged with rufous; (2) plurilocular, maturing later, 
0-5 mm. or more in diam., scattered, round, flat, discoid, black, 
somewhat shining, for-a long time solid and sterile, at length 
dehiscing by 1—4 (usually one or two, rarely four) conico-truncate 
openings which are often occupied at first by a similar fur- 
furaceous disc, but are at length filled with the white mass of 
the abundant exuded spores. Spores alike in both, cylindrical 
