I believe this is a death cap button. The cap is olive/brown/green, it has some faint fibrous areas. It is bell shaped, about 2 cm wide. The stipe has a large volva and is bulbous, it is tan and slightly fibrous, it is short about 3 cm long but it is very young. The gills are attached, close and white. No KOH reaction. The flesh is firm and white
It was under a coastal oak at the edge of the park

COLLECTION SPECIMEN

-found emerging from heavily decayed hardwood, likely alder
-yellow-orange to pink tones
-approximately 1cm in length
-larvae segmented, approx 2.5cm in length
-larvae covered in creamy yellow matter, mycelial?
-under hand lens, the tip is covered in minute bumps w/ dark pores
-spore producing surface seems to wrap around the 'stipe' with small point protruding at the tip (visible in last pic)

COLLECTION SPECIMEN BIO-F23

Found in Humboldt coastal range near Trinidad under Sitka Spruce on leaf litter that had accumulated on a decaying log . Growing alone
Pileus
Central small umbo to plane
/greyish silver, slight white patches, slight uplift at margin/viscid
Gills White/beige in bruised areas/free/crowded
Stipe
equal/thin/annulus present/striations above ring /extremely bulbous at base/volva present /white
Spore print: white

Translucent striate