Lactarius croceus

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

Fruiting bodies (especially the gills) exuding a liquid (called a latex) when broken
Stalk (and sometimes even gills) usually concolorous with cap

Cap orange or yellowish orange
Latex usually orange or yellow

Hot Orange Lactarius     Section Cap up to 4" across; zonate Taste acrid

Links from Look-alikes Slimy Lactarius     Subgenus Cap sticky or slimy when fresh

Lactarius croceus     Burlingham