1920] 
BURT—THELEPHORACEAE OF NORTH AMERICA. XII 235 
umbo prolonged into stem-like form. Such fructifications occur 
rarely and are perplexing if not gathered in the same collection 
with the usual sessile fructifications. 
S. ochroleucum Fries, Hym. Eur. 639. 1874; Sacc. Syll. 
Fung. 6: 562. 1888; Massee, Linn. Soc. Bot. Jour. 27: 184. 
1890. 
Corticium ochroleucum Fries, Epicr. 557. 1838.—Not Stereum 
ochroleucum Bres. Ann. Myc. 1: 91. 1903, nor Brinkmann, 
Westfálische Pilze, 49. 
Type: authentic specimen in Kew Herb. 
This species does not occur in North America and adjacent 
regions although reported from time to time from United States, 
Cuba, and Venezuela. Since I have not received under any 
name specimens of the true Stereum ochroleucum from European 
correspondents, this species is probably rare in Europe, and it 
may help toward recognition of the species to call attention to 
the specimen in Kew Herbarium. 
The specimen is labelled: 
“Corticium ochroleucum Fr. 
Svex. Westm. 
Maji — leg. Lbd.” 
This specimen agrees well with the original description; its 
reflexed portion is 13 cm. broad, about 1-1 1/5 mm. thick as the 
sections show in my preparation; the consistency is soft in com- 
parison with S. hirsutum and the hyphae about 23 mm. in 
diameter, granule-incrusted, and interwoven throughout the 
thiekness of the pileus rather than parallel and longitudinally 
arranged side by side as in S. hirsutum and S. sulphuratum. In 
other words there is not the sharply marked intermediate layer 
which Fries regarded as an important distinctive character of 
the genus Stereum, and this is probably the reason for his orig- 
inally regarding this species as a Corticium although broadly 
reflexed. There is not present a hardened crust or golden zone 
to mark the upper side of the intermediate region, but instead 
the hyphae become more loosely arranged toward the surface and 
become the hairy covering of that side. No cystidia, gloeo- 
cystidia, nor colored conducting organs are present; the spores 
are hyaline, even, 43-5X3 y. 
