Tatraea macrospora
As a saprobe (decomposer) this tiny cup fungus grows from
rotting wood (which it helps to rot). Fruit body has a hard
consistency. Fertile surface color can vary from pearl white,
off-white, gray, and brownish. Under-surface finely hairy.
Usually exhibits a short stalk, or stem. Order Helotiales.
The specific epithet of this fungus (macrospora) means large spores; they
measure 22-34 x 6-8 µm. Paraphyses are abundant and thread-like.
See Tatraea macrospora at
Fungi Growing on Wood