The boletes of Michigan, by Alexander H. Smith and Harry D. Thiers.

BOLETINELLUS Murrill
Mycologia 1:7. 1909
This genus features ellipsoid to subglobose spores, an hymenophore coarsely boletinoid (varying from merulioid to nearly lamellate),
lack of a veil, and the stipe lateral, eccentric or central.
Type species: Boletinellus merulioides.
Observations.-In our estimation this species is not at all closely
related to Gyrodon lividus of Europe. To us the latter seems more
closely aligned with Suillus. Our opinion is based upon excellent illustrations of the European species, detailed descriptions, and dried specimens. The genus likewise does not appear close to Phylloporus of the
Paxillaceae. In the latter genus the gills closely resemble those of
Gomphidius in thickness, attachment, and spacing.
212. Boletinellus merulioides (Schweinitz) Murrill
Mycologia 1:7. 1909
Boletinus merulioides (Schweinitz) Coker & Beers, Bol. of N. Carol. p. 87. 1943.
Gyrodon merulioides (Schweinitz) Singer, Rev. de Mycol. 3:172. 1938.
Daedalea merulioides Schweinitz, Trans. Amer. Phil. Soc. 4(ns)pt. 2:160. 1832.
Illus. P1. 156.
Pileus 5-12 cm broad, plane to plano-convex with an incurved
margin, expanding to plane or shallowly depressed on the disc and with
a wavy spreading uplifted margin, margin sterile, entire, incurved to
involute when young; surface soft, glabrous to pruinose or with a fine
tomentum, dry texture occasionally appearing appressed-fibrillose scaly
on the disc, colored various shades of dull yellow-brown when bruised.
Context up to 1 cm thick, often thinner, soft but toughish, pale oliveyellow or pinkish next to the cuticle, unchanging or rarely slowly
changing slightly to bluish green when cut; taste of raw Irish potatoes,
odor not distinctive.
Tubes 3-5 mm deep, strongly decurrent, radiating, light yellow or
often with a greenish tint, finally dull ochraceous, when young changing
to dark olive and later reddish brown when injured; pores compound,

394