MONOGRAPH OF CHAETOMIUM AND ASCOTRICHA 171 
6. CHAETOMIUM CRISPATUM Fuckel, Symb. Myc. 90. 1869 
Sphaeria crispata Fuckel, Fung. Rhen. 2022. 1867. 
Chaetomium streptothrix Quélet, Mém. Soc. d’Emul. Montbeliard 
1875: 103. pl. 4, f. 40. 1876. 
PLATE 9, FIGS. 5-9 
Gray to gray black. Perithecia of medium size, globose or 
subglobose with a bluntly pointed base. 263 X 253 4 (198-320 
X 183-350). Lateral hairs numerous, straight or slightly flexed, 
long, slender, gradually tapering to a point, smooth, regularly 
septate, about 4 u in thickness and dark olive-brown at base, 
fading to:yellow and becoming colorless near the tip, frequently 
breaking at maturity and giving to the surface of the perithecium , 
а coarse, rough appearance. Terminal hairs dense olive-brown 
to black, rather evenly roughened with minute spines throughout, 
below about 4 и in thickness, straight or slightly curved, septate, 
twisting or coiling above into an irregular spiral, near the tip 
forming alternate loops and arches, ending in an arch with circi- 
nate tip, irregularly and obscurely septate above, enlarging to 
7.5 in thickness at the crown of the terminal arch. Asci 8- 
spored, long, narrow, cylindrical, 80-100 X 8-10 и, pars sporif. 
65-80 и. Spores monostichous, hyaline and filled with greenish 
refractive globules when young, when mature, dark rich olive- 
rown, lemon-shaped, apiculate at both ends or broad and apicu- 
late at one end and slightly more pointed and less conspicuously 
apiculate at the other, 11.7 X 8.8 u (11.3-12.1 X 8.1-9.7), when 
seen edgewise, compressed, lenticular, 6.4 и broad. 
This species has been found frequently on various substrata 
from different localities in New England (Chivers No. 9). Re- 
ported also from England, and various localities in Europe. Type 
locality: in the cellar of L. Fuckel; on rotting potatoes. | 
Exsiccati.—Fung. Sax. XXIV, 1167. Sub Sphaeria crispata 
Fuckel: F ung. Rhen. 2022. | 
In 1876 Quélet described under the name Ch. streptothrix fungi 
Which he found on rotting potatoes and which he thought might 
be the ascosporic stage of Peronospora infestans. While there are 
nO figures accompanying his brief and somewhat indefinite - 
scription, it seems probable that it is identical with Fuckel's 
species for the following reasons: the hairs are described as tortuous, 
the specimens were found on rotting potatoes, a place where СВЕ 
is peculiarly likely to find Ch. crispatum, and ће name which һе 
gave indicates the same type of twisted hairs. 
