I wonder if this small plant could be Calyptridium monandrum (Common Pussypaws)? This one is about 3" across, and one of hundreds dotting the sand dunes. Many were much smaller. I vaguely remember it as a Claytonia.

Total of 4 observations, first set of photos 1-5 are from Dec 20/20 when they were just pins. The 4 after the tree shot 7-10 were taken on Dec 26/20 after there had been a snowfall then thaw and caps had opened. Images 11-12 are Jan 4/21. Image 13 was on Jan 13/21.

NAMP # 73140

DATE: 05 APR 2020

STATE: WA

COUNTY: PIERCE

FORAY ID: SSMC Mycoflora Project

SITE NAME: Steilacoom Park, Lakewood

iNat #: 41693254

NEARBY FLORA: Deciduous: Apple, Cherry, Damson Plumb; Evergreen: Scotch Broom.

SUBSTRATE: Dense Humus Soil, Grass, Sparse Moss.

HABIT: Few (7 within 2 x 8-foot area).

LIGHT EXPOSURE: Full sun (40-50% of day)

ODOR: Indistinct.

TASTE: Nutty.

REFERENCES: Pictorial Key to Mushrooms of the Pacific Northwest, Danny Miller.

DETAILED PHYSICAL DESCRIPTION:

CAP: Oval to Elongate, Pale Tan, except having a Rusty-to-Brown discoloration starting at the Cap Top, spreading out then proceeding down the cap about 3-4cm. Length is anywhere from 3-10cm, and width ranges from 5-5cm. The pits are longitudinally arranged, yet irregularly shaped, round to elongate. Inside, the pits tend to be lighter. Hollow inside with varying sized granules, like sand covering the flesh.

STIPE: White, 2-3cm long and 1-2.5cm thick. Irregularly shaped, the base is somewhat enlarged.

FLESH: Pale Tan on the outside, and white internally.

SPORES: unk

MYCELIA: White, fairly dense, directly below the substrate cover. Appears to run shallow in the packed substrate, ~1-2cm.