Hesler & Smith
2 - 9 cm broad; when young convex
and finally depressed at maturity, at times becoming funnel-shaped;
at first, becoming straight and finally uplifted and flaring, exceeding
gills, straight and even at times striate
and grooved; surface moist to viscid
smooth, often uneven and lumpy; when young brownish orange to light
brown on disc
and dark brown on margins, when mature greyish, orange brown to dark
brown, evenly or at times fading to brownish yellow to golden light
brown towards margins, at times edges reddish white to pallid; context
0.7 - 1.0 cm at junction of stipe, cuticle
thick, spongy to firm, moist, colour pallid to whitish to brownish;
taste mild to acrid;
odour indistinct to variously described as mushroom like
metallic, chemical to household cleaner,
Latex: White, changing to olive green, at times yellow brown, taste mild at first then peppery.
Lamellae: Horizontal to decurrent, average to crowded, narrow to broad, 4 mm wide, at times forking; edges even; colour orange white when young, darker when mature (reddish white), spotting golden brown, 3 lamellulae.
Stipe: 2 - 8 cm long X 0.5 - 2.0 cm wide, slightly tapering upwards to even, flexuous, tacky to viscid, at times striate, smooth to lumpy at times scrobiculate, same colour as gills (orange white), pale orange, darkening when bruised; context moist, stuffed to solid becoming hollow when mature, fragile, same colour as stipe surface.
kauffmanii is common in these forests and can be confused with
L. pseudomucidus but is differentiated by having a stipe that
is pale and the same colour as the lamellae.
L. pseudomucidus has a darker stipe that is the same colour
as the pileus. The latex
of L. kauffmanii is white that dries green, while L. pseudomucidus
also has white latex
but it doesnt change colour.
Hesler, L.R. and A.H. Smith. 1979. North American species of Lactarius. Univ. Michigan Press. Ann Arbor, Mich. pp 841.
Methven, A.S. 1997. The Agaricales (gilled fungi) of California. 10. Russulaceae II. Lactarius. Mad River Press. Eureka Ca. pp 78.