Auriscalpium vulgare
Michael Kuo of MushroomExpert.Com calls this little mushroom "goofy",
and it is. But it is also cute as a button and about the same size.
Although said to be common, you really have to look for it specifically.
Just check out every pine cone lying on the ground and, sooner or later,
you'll be rewarded with this goofy little toothed mushroom.

This collection was found in August growing from a pine cone; also
found on the cones of Douglas fir. Cap and stem have a tough
consistency and are finely hairy. Teeth are white, brown with age. Stem
is laterally placed, not centered. Spore print white.
The roundish spores of
Auriscalpium vulgare
measure 3.5-6 µ.
Complete description at
MushroomExpert.Com
Auriscalpium vulgare
Auriscalpium vulgare