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

226

THE BOLETES OF MICHIGAN

pileus dull cinnamon ("Sayal-brown") which is much duller than the
colors as given in the description. We have never seen a veil of any sort
on young basidiocarps though hundreds have been examined. In
Michigan the closely related B. projectellus is much more frequent. It is
terrestrial, usually growing on sandy soil under pine.
116. Boletus projectellus Murrill
Mycologia 30:525. 1938
Ceriomyces projectellus Murrill, Mycologia 30:524. 1938.
Boletellus projectellus (Murrill) Singer, Farlowia 2:129. 1945.
Illus. P1. 95.
Pileus 4-12 cm broad, convex becoming plane, margin slightly
overlapping the tube layer; surface dry, subtomentose, soon areolatesquamulose, dry at all times; color pale to dark dingy cinnamon varying
to olive tinged in some areas or more or less reddish and at times bayred. Context pallid, when cut becoming flushed vinaceous near the
cuticle but elsewhere slowly changing to yellow-brown, scarcely colored
around larval tunnels, taste acid, odor not distinctive.
Tubes pale olivaceous, 1-1.5 cm long, depressed around the stipe,
not staining when cut; pores 1-1.5 (2) mm broad, round or nearly so,
pale olive fresh, staining lemon-yellow bruised.
Stipe 7-12 cm long, 1-2 cm thick, equal or slightly enlarged downward, solid, pallid within, base with a white mycelial outer layer, then a
dingy olive-brown zone outlining the cortex, interior pale pinkish buff
with some olive-brown stains from the context having been cut; surface
dingy vinaceous-buff to cinnamon-buff (or reddish below), unpolished
and both coarsely and shallowly reticulate at times nearly to base.
Spore deposit olivaceous; spores 18-33 X 7.5-10 (12) M, ovate to
boat-shaped in face view or at times slightly angular, in profile inequilateral and with a prominent suprahilar depression, smooth, wall
thickened slightly (less than 1 /a thick), when dried hymenophoral tissue
is crushed in Melzer's the tissue becomes bluish black and under transmitted light many spores seen to be amyloid but on standing a few
minutes many become dextrinoid at least in the distal half or on one
side or, more rarely, overall; lacking a distinct apical pore, in KOH
golden yellow and wall measuring 1-1.5 / thick.
Basidia (3) 40-50 X 9-12 #, clavate, yellowish in KOH fading to
hyaline, 2- and 4-spored. Pleurocystidia subcylindric to fusoid-ventricose,
55-80 X 9-18 g, smooth, thin-walled, hyaline, readily collapsing, some
also present on tube edges as cheilocystidia.