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

Subgenus Piperites

227

Pileus 5-6 cm broad, irregular, whitish with creamy or honeycolored zones, coarsely tomentose, margin involute. Context with a
taste like cypress wood. Latex white, very sparse, mild.
Lamellae cream at maturity, staining pink then light smoky
brown where cut, crowded, narrow (2-3 mm broad), a few forked.
Stipe 1.5 cm long, 11-15 mm thick, white, with a few creamy
dots or with a few spots (scrobiculate), densely but minutely tomentose
all over, tapering downward, hollow.
Spores from gills-very few present-5.5-7 X 5.5-6.5 g, globose to
subglobose, with a distinct plage; ornamentation of short ridges and
warts not forming a reticulum or only a broken one, height of ornamentation up to 0.5,u.
Basidia generally immature, about 37 X 7.5 I,. Pleurocystidia:
macrocystidia none; pseudocystidia none seen. Cheilocystidia about
37 X 5-8 tu (possibly young basidia). Gill trama lacking rosettes and/or
nests of sphaerocysts, oleiferous debris from lactifers present. Pileus
context with nests of sphaerocysts; lactifers hyaline to pale yellow in
KOH. Pileus cuticle an ixocutis, slime evident in Melzer's; hyphae
often arranged in bundles which curve upward to form the surface
fibrils and squamules, the individual hyphae 4-5,u wide, no incrustations or debris observed.
Habit, habitat, and distribution.-On soil, Chapel Hill, North Carolina, Coker 2813 (type, NCU), July 3, 1917.
Observations. —It is a matter of opinion as to whether this species
should be placed in section Piperites or in the Aspideini. We place it
in the latter, but have not seen fresh material. It should be easily recognized in either section. The truly small spores and whitish pileus with
pale yellow zones distinguish it in the Aspideini. In section Piperites
it is readily distinct from the L. pubescens complex by the color
change and mild taste. The viscidity of the pileus needs checking
from fresh material.
62. Lactarius repraesentaneus Britz. sensu Neuhoff
Neuhoff, Die Milchlinge p. 111. 1956.
Illus. Pls. 89-90; fig. 87.
Pileus (4)6-15(20) cm broad, convex-depressed to plano-depressed
but usually the margin arched, in age broadly infundibuliform, with
varying degrees of viscidity depending on the weather, with an overlay
of fibrils more coarse and numerous toward margin (disc ~ glabrous
at times), the edge at first coarsely bearded; color pale to rich yellow
or orange-yellow, developing clay color to rusty tints over central area,
staining purplish where bruised, the fibrils at first pallid becoming