[Vor. 7 
180 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
Fructifications coriaceous, orbicular, and attached by the 
center, or fan-shaped and laterally confluent, lobed, the upper 
surface velvety hirsute on the region of recent growth, becoming 
somewhat glabrous in the older region near place of attachment, 
narrowly concentrically sulcate, somewhat zonate, snuff-brown, 
becoming Saccardo’s umber; hymenium even, Saccardo’s umber 
to drab, somewhat pruinose; in structure 600-800 y thick, with 
the intermediate layer connected with the hairy covering by a 
blackish dense crust; hyphae of intermediate layer snuff-brown, 
blackening by action of dilute potassium hydrate, longitudinally 
arranged, thick-walled, 3-4 y in diameter; hymenial layer 
simple; no colored conducting organs, cystidia, nor aculeate 
paraphyses; spores hyaline, even, 4-5 X 21-3 ,. 
Pileus 2-5 cm. in diameter. 
On logs. Cuba and Jamaica. October and November. 
Rare. 
S. vibrans is related to S. crassum but seems distinct by having 
smaller spores and a thin, blackish, horn-like crust under the 
hairy covering; the other histological details are very similar 
however. S. vibrans may be distinguished from the other 
species of the West Indies by its tobacco color, pruinose hymen- 
ium, and lack of cystidia, gloeocystidia, conducting organs, 
and bottle-brush paraphyses. S. papyrinum is of similar colora- 
tion, but is more spongy, has incrusted cystidia, and does not 
have its intermediate layer bordered above by a crust. 
Specimens examined: 
Cuba: C. Wright, 530, type (in Curtis Herb.). 
Jamaica: Rose Hill, F. S. Earle, 299, 303, comm. by N. Y. Bot. 
Gard. Herb. 
52. S. crassum Fries, R. Soc. Sci. Upsal. Actis III. 1: 111. 
1851 (not Thelephora crassa Léveillé); Sace. Syll. Fung. 6: 582. 
1888. 
Type: in Herb. Fries. 
Fructification coriaceous, resupinate, effused, sometimes re- 
flexed, villose, blackening, the margin obtuse, determinate, 
paler; hymenium even, dark chestnut-brown; in structure 1000 
u thick, with intermediate layer not bordered by a darker denser 
zone or crust, composed of longitudinally and rather loosely 
