180 MONOGRAPH ОЕ CHAETOMIUM AND ASCOTRICHA 
spreading branchlets, and spores of the same shape and size. 
The statement made by Palliser in North American Flora (p. 63), 
where Ch. indicum Zopf is listed as a synonym under Сл. setosum 
Wint., to the effect that Ch. setosum Wint. is the same as Ch. 
indicum Zopf, but not the same as Ch. indicum Cda., is ‘not 
easily understood, since Zopf in Nova Acta (p. 279) simply copied 
Corda's description of Ch. indicum, and made no statements 
which seem in any way at variance with Corda's original descrip- 
tion. 
On the one hand this species may be confused with Ch. elatum, 
from which it differs in the small size of its perithecium, the 
spreading or reflexed branches of the terminal hairs, and by its 
spores which have much smaller dimensions. Оп the other hand 
it may be confused with Ch. funicolum, especially when only the 
mature stage is studied. In its younger condition Ch. indicum 
is covered throughout with straight, spine-like hairs, the lateral 
ones only of which are visible at maturity. Later terminal hairs 
appear with branches spreading or reflexed, and still later, hairs 
which branch by narrow angles and which grow up among the 
branches of those already formed. In this way a dense head is 
formed consisting of innumerable branches, and the identity of 
the hairs is more or less concealed. Тһе plant finally has a 
greenish-gray and powdery appearance similar to that of Ch. 
funicolum Cke., due in part to the large number of refractive hair 
tips and also to the clusters of crystals on the ultimate branches. 
I5. CHAETOMIUM ELATUM Kunze & Schmidt, Deutsch. Schwám. 
3. 1818; Fries, Syst. Myc. 3:253. 1829 
Chaetomium atrum Link; Linnaeus, Spec. Plant. Ed. 5, 1: 40. 1824- 
Chaetomium atrum, var. distinctum Roumeguére, Rev. Myc. 8: 
198. 1886. Not Chaetomium atrum, var. Therryana Roume- 
guére & Patouillard, Rev. Мус. 5: 29. 1883. 
Chaetomium comatum (Tode) Fries, Syst. Myc. 3: 253. 1829. 
Not Chaetomium comatum, var. helicotrichum Saccardo, 
Michelia 1: 222. 1878. 
Chaetomium comatum, var. ligni Roumeguére, Fung. Gall. LXIV, 
6309. 
Chaetomium Fieberi Corda, f. chartarum Roumeguére, Fung. Gall. 
LIX, 5827. 1801. 
