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

APPENDIX

405

Boletus tennesseensis Snell & Smith, Journ. E. Mitchel Sci. Soc. 56:327.
1940
Illus. Figs. 106-7.
Type study. Spores 6.5-9 X 4.5-5 jI, smooth, thin-walled, lacking
an apical pore, ellipsoid, ochraceous to yellowish hyaline in KOH, only
weakly tan in Melzer's.
Basidia 4-spored, 20-30 X 8-9 p., clavate, yellow to hyaline in
KOH, yellowish in Melzer's, content not distinctive. Pleurocystidia rare,
28-37 X 9-12,, fusoid-ventricose, apex subacute to obtuse, content not
distinctive in KOH or Melzer's, mostly nearly buried in the hymenium.
Pileus cutis a matted-down layer of intricately interwoven hyphae
6-9 I wide, with numerous short cells and relatively few truly elongated
cells, walls distinctly roughened or incrusted as revived in KOH (in
which medium the hyphae are boldly defined), in Melzer's smooth or
nearly so, lacking distinctive content and not boldly defined, the endcells short, 15-36 X 7-10 g and obtuse, subcylindric or only very
weakly tapered to apex, content not distinctive. Hyphae of subcutis
8-12 I wide and hyaline to yellowish in KOH or Melzer's, no amyloid
material on walls present and no fleeting-amyloid reactions noted. Clamp
connections absent.
Notes. The spores, the short, incrusted cells of the pileus cuticle,
and lack of any fleeting-amyloid reaction distinguish this species from B.
miniato-olivaceus either in the sense of Coker and Beers (1943) or the
type. Coker and Beers placed it in synonymy with B. miniato-olivaceus.
Boletus underwoodii Peck, Torrey Club Bull. 24:145. 1897
Illus. Figs. 118-19.
"Pileus rather thin, convex, becoming nearly plane, slightly velvety, bright brownish red, becoming paler with age, flesh yellow,
changing to greenish blue where wounded; tubes adnate or slightly decurrent, greenish yellow, becoming bluish where wounded, their mouths
very small, round, cinnabar red, becoming brownish orange; stem equal
or slightly tapering upward, somewhat irregular, solid, yellow without
and within; spores.0004-.0005 in. long,.0002 in. broad. Pileus 2-3 in.
broad; stem 3-4 in. long, 4-6 lines thick.
"Grassy woods, Auburn, Alabama, Underwood."
Type study. Spores 9-12 (3) X 3.54.5,, smooth, thin-walled,
shape in face view narrowly elliptic to subfusiform, in profile obscurely