Hesler and Smith
Pileus: 2.5 - 5.0 cm broad; convex when young, then planar to depressed and finally broadly funnel shaped; margins inrolled at first then straight and even; surface smooth, moist to viscid to glutinous, if weather is dry then shiny and polished; colour, evenly pale to greyish brown to grey black, at times pallid; context thin, fleshy, pallid to brownish to orange to grey; taste slowly peppery, odour insdistinct;
Latex: White unchanging, acrid, at times changing gills yellow brown.
at first then becoming decurrent;
average to crowded, narrow, edges are even, at times forking at stipe;
colour white to pallid, when bruised becoming yellowish to light brown;
1 - 3.
Stipe: 3.0 - 4.0 cm long X 1.0 cm wide; equal, straight, surface smooth without pits or spots, moist to viscid, colours similar to cap, but can be olive to brownish grey; context solid at first then hollow, fragile, white but the rind same colour as the stipe surface.
Comments: This Lactarius is very common in these forests, and is easily recognized by the viscid cap and stipe. It is differentiated from the similarly common L. kauffmanii by having grey black coloured cap and stipe. L. kauffamanii has a brown grey cap and its stipe is the same colour as the pale pink gills.
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.