Lactarius thyinos

Key to Gilled Mushrooms Key

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.

Russulales Suborder

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

Lactarius Genus

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

Orange Lactarius Subgenus

Cap orange or yellowish orange
Latex usually orange or yellow

Not Hot Orange Lactarius Section

Not acrid
Sometimes sticky
If zonate, then very faintly

Lactarius thyinos A. H. Smith

Here are the characters that distinguish this species from the others in its group. For its more general characters, see higher up on the page.
If there's just a few words or a microscopic feature here, a more thorough description can be found above.