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NEW YORK STATE MUSEUM 
farinaceous at first, but quickly becomes hot or peppery like the taste 
of acrid species of Lactarius and Russula. It is to be regretted that 
Fries neglected to note the flavor of species of Hydnum, for it is of 
value in their identification. 
The substance of the stem and pileus, except the superior stratum 
of the latter, is brittle when fresh, but compact and slightly or line- 
ately zoned within, a character not ascribed by Fries to his plant. It 
becomes hard and woody when dry. It might be called compactly 
fleshy when fresh and moist, and then it has some points of agree¬ 
ment with H. acre Quel. But Quelet fails to notice any difference in 
texture in the upper and lower strata of the pileus in his plant, a fea¬ 
ture well shown by our specimens and strongly emphasized by Fries 
in the description of H. mirabile. For this reason we have referred 
our plant to H. mirabile, although otherwise agreeing quite well with 
the description of H. acre. The description of H. mirabile attributes 
an alutaceous color to the pileus, but the figure indicates a pale yel¬ 
low color. In our plant the color varies from grayish-buff to brown¬ 
ish-buff. Possibly our plant may prove to be a species distinct from 
both. 
Hydnum separans n. sp. 
Resupinate, white; subiculum membranous, at first pure white, 
becoming yellowish or cream color with age; aculei subulate, 
glabrous, crowded, 2 to 3 lines long, fragile, easily separating from 
the subiculum and leaving in it alveolar impressions; spores globose, 
colorless, .00016 in. broad. 
Much decayed wood of deciduous trees. Adirondack mountains. 
July. 
After the teeth have been separated from the subiculum it resem¬ 
bles somewhat a shallow-pored species of Poria. By this character, 
the thinner subiculum and the smaller spores the species may be sep¬ 
arated from H. mucidnm, to whch it is allied. 
Hydnum serratum n. sp. 
Resupinate, white; the subiculum thin, somewhat gelatinous, livid 
white or bluish-tinted; aculei crowded, short, somewhat confluent in 
small fasciculate compact clusters, compressed, serrate on the sides 
and at the apex, white, sometimes slightly tinged with straw color. 
