. [Vor. 7 
226 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
Specimens examined: 
Italy: Florence, Martelli, comm. by G. Bresadola. 
Florida: C. G. Lloyd, 4846. 
Venezuela: Fendler, 177 (in Curtis Herb.). 
75. S. durum Burt, n. sp. Plate 6, fig. 75. 
Type: in Smith, Central Am. Fungi, 147, copy in Mo. Bot. 
Gard. Herb. 
Fructification very hard, orbicular, attached by the center, 
free or reflexed all around, concentrically sulcate, fuscous to 
| bone-brown, with a horn-like crust, 
becoming somewhat shining; hyme- 
nium even, not shining, between pale 
drab-gray and tilleul-buff, somewhat 
pruinose; in structure 2-3 mm. thick, 
hazel throughout, and multizonate or 
stratose, containing many scattered 
crystals, hyphae 334 u in diameter; 
paraphyses of bottle-brush or aculeate 
form, numerous and conspicuous in 
the hymenial surface, cylindric, 12-15 
X4-5 u; no cystidia; no spores found. 
Fructification 3 cm. in diameter, 
Fig. 46. 5. durum. Section reflexed 1 em. 
of hymenial region of type X A 
90; bottle-brush paraphyses, p, On dead wood. Mexico. 
665. S. durum is much thicker, harder, 
and more rigid than S. insigne and 
not tomentose. The microscopic structure agrees exactly with 
that of preparations from an authentic specimen in Kew 
Herbarium of Stereum annosum, No. 99, collected at Neil- 
gherries, Ceylon, and should be compared with the latter 
when better known. For the present the development of a 
pileus by S. durum, with characters as stated, is reason for 
regarding this species as distinct from S. annosum, a resupinate 
species of the other side of the world. 
Specimens examined: 
Exsiecati: Smith, Central Am. Fungi, 147, under the name 
Stereum ferreum. 
Mexico: Jalapa, C. L. Smith, type, in Smith, Central Am. Fungi, 
147. 
