[Vor. 7 
176 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
hyphae 3-33 „ in diameter; no colored conducting organs, 
gloeocystidia, nor cystidia present; spores hyaline, even, flat- 
tened on one side, 6—7373-33 y. 
Fructifications 1-11 cm. in diameter, confluent along limbs 
10 em. and more, the reflexed portion 5-10 mm. broad, 3-10 mm. 
long. 
In swampy woods on under side of dead twigs of Carpinus 
caroliniana, recorded rarely on Liquidambar and Nyssa. Can- 
ada to Louisiana and westward to Missouri and in Mexico. 
Throughout the year. Infrequent. 
Stereum sericeum is very appropriately named, for its silvery 
to pale gray pilei are noteworthy by their silky or satiny luster; 
they are smaller, thinner, and more flexible than those of S. 
rameale and with innate rather than fibrose-strigose fibrils; 
these pilei lack the ruddy and ochraceous hues characteristic 
of S. rameale; furthermore the pilei of S. sericeum are plane, 
while those of S. rameale are folded laterally or crisped. Never- 
theless I have received some scanty specimens of S. rameale 
from the West and South which were sparsely developed and 
bleached out so as to simulate S. sericeum. In New England 
and New York, S. sericeum has been invariably on Carpinus 
caroliniana when the substratum has been recorded, but else- 
where S.rameale has sometimes been recorded on other substrata. 
'The concept of S. sericeum is that held by all American my- 
cologists and is in conformity with the specimens in Curtis 
Herbarium determined by Berkeley and Curtis who studied the 
authentic specimen. 
Specimens examined: 
Exsiccati: Ellis, N. Am. Fung., 19; Ell. & Ev., Fungi Col., 705; 
Ravenel, Fungi Car. 1: 21; Shear, N. Y. Fungi, 312. 
Ontario: London, J. Dearness; Ottawa, J. Macoun, 20, 30, 277; 
Toronto, G. H. Graham, Univ. Toronto Herb., 675 (in Mo. 
Bot. Gard. Herb., 44918), and T. Langton, Univ. Toronto 
Herb., 518, 594 (in Mo. Bot. Gard. Herb., 44842, 44848). 
Vermont: Middlebury, E. A. Burt, five collections. 
Massachusetts: Wayland, A. B. Seymour, T23 (in Mo. Bot. 
Gard. Herb., 22097). 
Connecticut: Goshen, L. M. Underwood, 224 (in N. Y. Bot. 
Gard. Herb. and Mo. Bot. Gard. Herb., 56658). 
