1920] 
BURT—THELEPHORACEAE OF NORTH AMERICA. XII 225 
19768, 19873, 19881 (in Mo. Bot. Gard. Herb., 9143, 8964, 
5920). 
74. S. insigne Bresadola, Nuov. Gior. Bot. Ital. 23: 158. 
1891; Sacc. Syll. Fung. 9: 222. 1891. Plate 6, fig. 74. 
Type: authentic specimen, probably part of the type, in Burt 
Herb. 
Fructification corky, drying rigid, hard, effuso-reflexed, the 
upper surface concentrically sulcate, somewhat zonate, tomen- 
tose, snuff-brown to bister, the recent 
growth at the margin paler; hymenium B i 
even, pinkish buff to drab-gray and i r 
pruinose; in structure 1500 , thick, 
with the intermediate layer bordered 
and connected with the tomentum by ho 
a darker and denser zone and bearing | 
on the opposite side a multizonate 
hymenium; hyphae of the intermediate Fig. 45. S. insigne. Sec- 
layer colored, thick-walled, densely We of pego deos 
a : : ic specimen X 665; bottle- 
and longitudinally arranged, 33 & in brush paraphyses, p. 
diameter; no cystidia; paraphyses of 
bottle-brush or aculeate form, numerous and conspicuous in the 
hymenial surface, cylindric, 25-30X 4-42 u; spores published by 
Bresadola as hyaline, even, 4-6 X 3-33 u—none found by me. 
Reflexed 13-4 cm., laterally confluent for 9 cm. in the Florida 
specimen. 
On oak logs. Florida, Venezuela, and Italy. February. Rare. 
This species belongs in the group with S. subpileatum and S. 
sepium and is not distinguishable in general aspect from these 
species, but its hymenium contains numerous and conspicuous 
bottle-brush paraphyses and no cystidia, while both of the other 
species named have cystidia. The Venezuelan specimen cited 
below was determined by Berkeley as Stereum illudens, from 
which it appears distinct, for while the type of S. illudens, in 
Kew Herbarium, collected by Drummond, 158, Swan River, 
Australia, has bottle-brush paraphyses for its hymenial surface, 
it has in its subhymenium elongated, cylindric, thick-walled 
organs 6 y in diameter, up to 100 y long, a little darker colored 
than the surrounding hyphae and curving outward into the 
deeper portion of the hymenium, which is not zonate. 
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