MONOGRAPH OF CHAETOMIUM AND ASCOTRICHA 183 
and figured by Greville seem to be very clear, the form has been 
re-described under many different names and confused many times 
with other species. 
In 1818 Kunze gave the name СЙ. elatum to specimens which 
were collected in the spring at Halle, Germany, on dead leaves of 
Typha and Sparganium, and which also occurred commonly on 
dried stems and leaves of the Aroidaceae and Gramineae. He 
called attention to the simple, unbranched hairs of the perithecium 
near the base, and the very long, rigid, branched hairs above, and 
while he gave no measurements of spores, he described their shape 
as oviform or globose. 
In 1826 Greville (43) published a diagnosis of Kunze's Ch. 
elatum accompanied by six figures, and while the description 
contains no more information than that of Kunze, the figures are 
instructive. ; 
In 1824 H. F. Link (54) published a note included in a brief 
comment on the Conopleae, to the effect that Conoplea atra 
Persoon is Chaetomium atrum, and in 1853 Desmaziéres (26) 
made the following statement: “According to specimens which 
we have received from M. Persoon, his Conoplea atra is surely a 
Chaetomium and not the Myxotrichum chartarum Fries (38, р. 349] 
thought it to be." It should here be stated that in connection 
with his specimens Desmaziéres listed Conoplea atra Persoon (е а 
Synonym under Ch. atrum Link, and indicated that һе had verified 
the Synonymy. Тһе very generous specimens of Ch. atrum, which 
were distributed by Desmaziéres, have been examined and found 
to be typical in every way of Ch. elatum Kze. It may be seen, 
therefore, that Conoplea atra Persoon is identical with Ch. atrum 
(Persoon) Link, and with Ch. elatum Kze. 
In 1829 Fries (38) gave to the Sphaeria comata of Tode (103) 
the new name Ch. comatum, and the use of this and of Кипге 5 
older name, Ch. elatum, has varied with later authors. In many 
Cases the former has been arranged as a synonym under the latter, 
but Saccardo (79, p. 221) and several other authors prefer the 
use of Ch. comatum (Tode) Fr., with Ch. elatum listed as a synonym 
thereto. While Fries published no figures there seems to be no 
doubt that his form is identical with Kunze's species, and since 
adequate description and figures of this plant under the name 
