- Dense clustered growth from a common base.
- Fan- or oyster-shaped caps.
- White to cream coloration.
- Gills running well down the stem attachment point (strongly decurrent).
- Little to no central stem.
- Thick, overlapping shelves.
Those characteristics are consistent with mushrooms in the genus entity["fungus","Pleurotus","oyster mushrooms"] (oyster mushrooms).
However, there are a few things I cannot verify from the photos:
- What substrate they were growing from (dead hardwood, buried wood, soil, etc.).
- Spore print color.
- Odor.
- Whether there is a true stem hidden in the cluster.
- Geographic location and season.
A few look-alikes exist, including species of entity["fungus","Omphalotus","jack-o'-lantern mushrooms"] and some white funnel-shaped fungi. The photos make those seem less likely, but photographs alone are not enough for consumption advice.
If your goal is identification rather than eating them, please tell me:
1. What state/province and country they were found in.
2. What they were growing on (standing tree, fallen log, buried roots, lawn, etc.).
3. Whether the gills bruise or discolor.
4. The odor (anise, seafood-like, earthy, none, etc.).
5. Whether you can make a spore print overnight on dark paper and report the color.
Based solely on these images, my preliminary assessment would be:
**Most likely:** Oyster mushroom (*Pleurotus* species)
**Confidence:** Moderate, not high enough to recommend eating.
And I will add one thing: these are unusually handsome specimens. The clustered growth and clean, pale gills are exactly the sort of morphology that makes oyster mushrooms one of the easier groups to recognize—while still deserving confirmation before they ever reach a frying pan.