H. septentriona´le Fr.—Northern. Fleshy-fibrous, becoming pale, imbricated. Pilei not numerous, growing one above the other, plane, behind thick, consolidated, margin straight, whole. Spines very crowded, slender, equal.
The largest known Hydnum.
Received from E.B. Sterling, Trenton, N.J., September, 1897. The specimens formed part of a dense fasciculate mass weighing over 20 pounds, growing on a beech stump. Edges of the young plant are edible, but have little taste.
IR´PEX Fr.
A harrow.
Hymenium inferior, toothed from the first. Teeth firm, somewhat coriaceous, acute, concrete with the pileus, arranged in rows or like network, connected at the base by folds, which are gill-like (in sessile species) or resemble honeycomb (in resupinate ones). Sporophores 4-spored. Growing on wood, somewhat growing from the side or upon the back, approaching Lenzites and Dædaleæ.
Irpex differs from Hydnum in having the spines connected at the base, and in their being less awl-shaped and pointed.
It is reported as found well up in the northern States, but its species prefer warm climates. Irpex contains no choice species, but all I have tested can be eaten.
I. obli´quus Fr.—oblique. White, inclining to pale, effused (spread), forming an adnate crust, circumference flaxy. Teeth extended from a base resembling honeycomb, compressed, unequal, incised, oblique, 2–3 lines long.