[Vor. 7 
156 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
of the umbo, at first densely tomentose and drying warm buff to 
tawny olive, at length weathering to pale smoke-gray to neutral 
gray and sometimes with the tomentum torn apart in narrow 
zones and showing the hazel or chestnut surface of the bared 
areas, the margin normally entire; in structure 400-700 u thick, 
with the intermediate layer composed of very densely arranged, 
hyaline hyphae 4 u in diameter and bordered on the upper side 
by a broad dark zone which bears the tomentum of the upper 
surface; hymenium glabrous, usually warm buff to cinnamon- 
buff, sometimes assuming violaceous tints; no cystidia, gloeo- 
cystidia, nor conducting organs; spores from spore collections 
white, even, flattened on one side, 53-73 X 23-3 y. 
Fructifications 2-7 cm. in diameter, often laterally confluent. 
On logs and stumps of Quercus and other hardwood species. 
Common throughout North America from Canada southward, 
in the West Indies, and in South America; occurs also in Norway, 
Sweden, Formosa, and Java, although apparently rare in the 
Old World. In vegetative condition from June onward in the 
north, persisting throughout the year. 
Specimens of S. fasciatum may be distinguished from those of 
the less common S. lobatum by the thicker tomentose covering 
of the former, which may continue unbroken throughout the 
year or become torn apart so as to show rather few and narrow, 
bared chestnut zones; the pileus of S. fasciatum is thicker than 
that of S. lobatum, and the margin has a lobate tendency but 
rarely. Towards the northern part of its range where I have 
observed the development of fructifications throughout the 
season, the fructifications are at first effuso-reflexed with the 
resupinate portion up to 1 em. broad, the reflexed portion 13 
cm. from base to margin, and with a lateral extent along the 
substratum of 2-8 cm.; umbos soon form at points 1-2 cm. 
apart along line of intersection of the plane of reflexed portion 
with the substratum; by further growth outward of the laterally 
confluent pilei these umbos become the final points of attach- 
ment of the pilei with the substratum. In Washington and 
California the fructifications may continue broadly reflexed 
when old and are difficult to distinguish from luxuriantly grown 
S. hirsutum. 
The specimens from Formosa, cited below, are in the stage in 
