64 NORTH AMERICAN FLORA [VoLumE 3 
clothed on all sides with hairs; lateral hairs simple, comparatively short, smooth; rhizoids 
slender, pale-brown, flexuous ; apical hairs of two kinds, simple and branched; simple 
hairs lanceolate, extending 375 « above the perithecium, smooth or nearly so, dark-brown 
or almost black at the base, gradually tapering toa point and becoming paler at the tip; 
branching hairs few in number or forming amass 180 above the perithecium, subhyaline 
or pale-brown to dark-brown, sometimes incrusted, usually smooth, with numerous 
ramifications, sometimes regularly dichotomous, more often irregularly branched; branches 
short, 15-20; spores small, broadly obovoid, scarcely apiculate, 4.5-6 & 3-4.5 #. 
On old broom, straw, and damaged hay. 
TYPE LOCALITY: Albany, New York. 
DISTRIBUTION : New York to Kansas. 
DOUBTFUL, SPECIES 
Chaetomium Douglasii Schw. Trans. Am. Phil. Soc. II. 4: 265. 1832. Perithecia with 
a dense olivaceous-greenish tomentum, very floccose, but not interwoven, springing from all 
sides but especially from the apex; perithecia densely aggregate, black-sooty, rather large, 
globose-ovoid, fragile, umbilicate at the apex; the tomentum arises to more than twice the 
height of the perithecia. On stems of Hyssopus anisatus Nutt.; in the vicinity of Lake Huron. 
Chaetomium Typhae Schw. Trans. Am. Phil. Soc. II. 4: 265. 1832. Perithecia very 
minute, black, punctiform, enveloped in hairs so minute that they are scarcely discernible 
except when magnified ; situated between the veins of leaves. On leaves of Typha; Beth- 
lehem, Pennsylvania. 
Chaetomium velutinum Ellis & Ev. Jour. Myc. 1: 90. 1885. Perithecia ovoid, mem- 
branaceous, gregarious, even more or less confluent, covered with a dense, even, velvety 
coat of rough, olive-black hairs of which the apical ones are nearly straight and coarser, 
while those toward the base are finer and somewhat branched; spores almond-shaped, 
brown, 11-12 X 6-7 u ; asci were already dissolved so that their shape could not be seen ; the 
general aspect is that of Sphaeria hirsuta Fries, but the hairy coat is more dense and even. 
On damp maple log. 
Chaetomium pallidum Ellis & Ev. Proc. Acad. Phila. 1894: 326. 1894. This appears 
to be a Melanospora. 
