MonoGRAPH OF CHAETOMIUM AND ASCOTRICHA 165 
A. Terminal hairs undulate or loosely, spirally 
coiled. 
perenne! hairs undulate, extremely fine and 
low, narrow above. Plant gray or olive 
yellow, at maturity golden yellow. 
Terminal hairs undulate or loosely spirally 
coiled. Branches few. Plant gray, olive- 
chocolate-brown. 20. Ch. globosum (р. 100). 
В. Terminal Su convolute in definite spirals. 
а. Perithecia gray when young, becoming 
in old age 
x. Perithecia subglobose or ovate. 
Terminal hairs slender, about 5 и in 
thickness near their tips, with 6-14 
coils. Spores large, 9 X 7 m, rich 
olive-yellow to olive-brown 21. Ch. spirale (p. 199). 
Terminal hairs stout, biet: ou in 
thickness near tips with 10-18 
coils. Sporesolive-brown, 7 X би. 22. Ch. aterrimum (p. 200). 
Terminal hairs regularly coiled with 
5-7 convolutions, or rem 
coiled with 2-3 
frequently produ cing branches. 
Spores elliptical in face view, hya- 
line or only slightly colored, 
. Ch. sphaerale (p. 189). 
- 
© 
7.4-6 и. 23. Ch. bostrychodes (р. 201). 
y. Perithecia elongated. 
Spores in face view four-sided and 
four-angled. 24. Ch. quadrangulatum (p. 202). 
Spores lemon-shaped or globose. 25. СВ. caprinum (р. 203). 
b. Perithecia green or golden yellow. 
convo! 
А: eg delicate, either coiling 
in spirals or twisting irregularly. 
Plant olive-green. 
Terminal hairs of ee types; (a) 
long, straight, tapering; (b) slen- 
der, straight below, coiling above 
spirally with about 5-7 convolu- 
tions; (c) stout, coarse, straight 
26. Ch. cochliodes (p. 204). 
: 27. Ch. angustum (p. 206). 
у. Perithecia elongated, bottle-shaped. 
