MONOGRAPH ОЕ CHAETOMIUM AND ASCOTRICHA 195 
rather fragmentary, characteristics which are those of Ch. glo- 
bosum, namely, olive-colored perithecia, simple flexuous hairs, 
and globose spores with slightly apiculate ends. The figure 
accompanying Cooke’s original description shows the same 
characteristics. 
In 1878 Cooke and Ellis gave the name Ch. olivaceum to a 
form which they found on rotting stems of Erigeron. It was at 
first thought by the present writer that this name could be associ- 
ated with a species which he has found frequently and which has 
apparently been recognized for the first time by Palliser (67) as 
distinct from Ch. globosum Kze. This does not seem to be true 
however, and from detailed study of the original description and 
an examination of mounts made from the type material, one is 
forced to conclude that Ch. olivaceum C. & E. is identical with 
Ch. globosum Kze. It should be stated that the plants in each 
of the specimens of type material in three different herbaria are 
past maturity. Dark, rich olive, umbonate spores, and larger, 
much more lightly colored, apiculate spores, are to be found in 
both Ch. olivaceum and Ch. globosum, the former type appearing 
more commonly in Ch. olivaceum, the latter in Ch. globosum. The 
hairs in Cooke and Ellis’s material, while old and for the most 
part frayed out, are typical of Kunze’s species. 
As a result of careful study of type specimens of Ch. macro- 
sporum, which was described by Saccardo and Penzig in 1882, 
and which has been received from Dr. Saccardo, it has been 
found that this species possesses characteristics sufficiently 
similar to those of Ch. globosum to warrant placing it as a synonym 
under that name. According to Saccardo's description the hairs 
of the perithecium are olivaceous and flexuous, but the өрежев 
measure 14—16 и. The original material was set apart ue 
two parcels; the one containing plants which prove to be typical 
of the young Ch. globosum, the other typical mature plants of the 
same species. The spores which belong to the mature perithecia 
do not have the size indicated by Saccardo, but measure, as for 
Ch. globosum Kze., 10.5-12.5й X 9-5 №. There аге, a 
intermingled with these plants the perithecia and spores of Ch. 
murorum Cda. Here may lie an explanation for the error made 
by the original writers, for the spores of Ch. murorum correspond 
