Murrill; Illustrations of Fungi 
291 
Daedalea quercina Pers. 
Oak-Loving Bracket-Fungus 
Plate io6. Lower Figure 
Pileus corky, rigid, dimidiate, sessile, imbricate, applanate, 
convex below, triangular in section, 6-12X9-20X2-4 cm.; 
surface isabelline-avellaneous to cinereous or smoky-black with 
age, slightly sulcate, zonate at times, tuberculose to colliculose in 
the older portions ; margin usually thin, pallid, glabrous ; context 
isabelline, soft-corky, homogeneous, 5-7 mm. thick; tubes laby- 
rinthiform, becoming nearly lamellate with age in some specimens, 
1-2 cm. long, 1-2 mm. broad, chalk-white or discolored within, 
edges obtuse, entire, ochraceous to avellaneous. 
This species is common on oak stumps and timbers throughout 
Europe and temperate North America, and is conspicuous by 
reason of its size and peculiar labyrinthiform fruiting surface, 
which becomes almost agaric-like with age. 
Elfvingia megaloma (Lev.) Murrill 
Artists’ Bracket-Fungus 
Plate 107 
Plate 108. Upper Figure 
Pileus hard, woody, dimidiate, applanate, 6-15X8-30X1-4 
cm. ; surface milk-white to gray or umbrinous, glabrous, concen- 
trically sulcate, encrusted, fasciate with obscure lines, conidia- 
bearing, usually brownish during the growing season from the 
covering of conidia ; margin obtuse, broadly sterile, white or slightly 
cremeous, entire to undulate ; context corky, usually rather hard, 
zonate, fulvous to bay, 5-10 mm. thick, thinner with age; tubes 
very evenly stratified, separated by thin layers of context, 5-^0 
mm. long each season, avellaneous to umbrinous within, mouths 
circular, 5 to a mm., whitish-stuffed when young, edges obtuse, 
entire, white or slightly yellowish to umbrinous, quickly changing 
color when bruised ; spores ovoid, smooth or very slightly 
roughened, pale-yellowish-brown, truncate at the base, 7-8 X 5 -^ 1 ^- 
Originally described from specimens collected by Menand in 
New York City. Found in great abundance throughout temperate 
North America on dead or diseased trunks or timber of most 
