Woodlands Historic Park Fungus

Upside down mushroom (Resupinatus subapplicatus) at Woodlands Historic Park
Upside down mushroom (Resupinatus subapplicatus), about 5mm across
side view of Resupinatus subapplicatus at Woodlands Historic Park
side view
distorted Resupinatus subapplicatus at Woodlands Historic Park
Upside down mushroom, a slightly distored form

As my invented common name implies, these grow on the underside of dead wood. They can have a very short stem on the opposite side from the gills.