North American species of Lactarius / L. R. Hesler, Alexander H. Smith.

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North American Species of Lactarius

feasible. Burlingham (1908) thought it might be the same as L. hygrophoroides.
Lactarius chrysorheus "Form A," Coker, J. Elisha Mitchell Sci. Soc.
34: 39. 1918
The latex did not change to yellow. We have not seen Coker's
material. The description is suggestive of L. zonarius and (as Coker
suggested) L. insulsus.
Lactarius cilicioides var. albus Peck, Ann. Rep. N.Y. State Mus.
38: 119. 1885
Pileus 3-5.5 cm broad, convex then plane, at first white, at times
becoming stained dingy yellow or rusty yellow especially in the center,
azonate, covered with a long tomentum, the center sometimes glabrescent, margin incurved. Context white. Latex sparse or almost none,
white, slowly changing to pale yellow, acrid. Lamellae adnate-decurrent, close, narrow. Stipe 1-2.5 cm long, 4-8 mm thick, white not spotted, dry, hollow.
Spores 5.5-7 X 4-5 u, ellipsoid, prominences 0.2 pu or less high;
ornamentation as broad bands and lines forming a partial reticulum.
Basidia 32-36 X 7-9,u, 4-spored. Pleurocystidia: Macrocystidia 32-54
X 7-9 ju, ventricose, apices tapering, at times constricted, granularspangled content or at times empty, rather abundant and conspicuous.
Cheilocystidia 33-38 X 5-7 u,, similar to macrocystidia, rather abundant.
Gill trama of undulating, subparallel hyphae. Pileus trama heteromerous. Pileus cuticle of repent hyphae, not sharply differentiated, bearing
strands composed of colorless hyphae (the tomentum); no gelatinous
cuticle present (the tomentum of more or less gelatinous hyphae).
Pileocystidia none. Clamp connections none. Stipe cuticle of repent
dry hyphae; rosettes none. Caulocystidia of two types: (1) similar to
pleurocystidia but larger (46-73 X 6-8 p), content granular-spangled;
(2) terminal elements on a chain of cells.
On soil in coniferous woods, Peck, West Albany, New York (type,
NYS).
The above data are from Peck's original account and our study of
the type. We exclude this variety at least for the present. The fungus is
clearly in the assemblage of variants around L. pubescens but the habitat is not typical of any we have recognized. The lack of vinaceous tints
prevents assignment to L. pubescens var. betulae, or to Fries' 1821 concept of L. cilicioides.