unidentified spherical fungi

Description:

Several off-white fungus balls, the largest ~ 2.5 cm in diameter. There did not appear to be any kind of opening on any of the fungi. The smallest ball, which had a greenish tinge, was removed from the log. It is shown in the second image. During removal, its "stem" remained attached and pulled out of the log, so the removed specimen looked like a miniature golf ball on a tee. It measured 25 mm from pointy end of the "tee" to the top of the "golf ball".

Habitat:

Lowland insular tropical mesic mixed forest.

Notes:

Spotted growing from deadwood along the Lower Waimano Trail in Waimano Valley in south central Oahu. The fungus ball shown in the second image was ~ 10 mm in diameter and was later dissected. The casing was no more than 0.1 mm thick. The interior was solid white mass. There did appear appear to be some interior structure in the form of subtle striations, but those could have been an artifact of the dissection rather than a characteristic of the fungus itself.