Russula crustosa

This is a key to gilled mushrooms, that is, mushrooms having a definite cap with a fertile surface consisting of gills. The fruiting body usually also has a stem, although that may be lateral or absent (usually, then, the mushroom is growing from wood). You can use this key to identify mushrooms that you find.

Flesh without fibers, fracturing with the same sort of break as a piece of chalk
Spore and gill color limited to white, yellow, or ochre
Mycorrhizal: occuring only on the ground, and only when there are trees nearby
No ring or volva on stalk
All fleshy-stemmed mushrooms whose gills exude a latex when cut go here

No latex
Cap usually brighter colored than Lactarius
Stalk usually white or tinged with color of cap

Cap at least partially green or olive, with no purple coloration
Try yellowish olive-capped specimens here first, before trying Yellow or Brown Russula

Cracked Green Russula     Section Cap cuticle crustose; sometimes with colored in areas (or even entirely) with brownish buff, yellowish, rarely lilac or bluish green Peeling 1/2 of the way to the center Flesh firm (until tunneled)

Links from Look-alikes Deeper yellowish Russula     SubSection Cap dull straw colored, amber, honey colored, or yellowish brown

Russula crustosa     Peck