Calypogeia again? Some of the smaller leaves seem to be bifid.
Growing out of a mossy soil embankment. Maybe Armillaria sinapina again?
Making it's weird gemma stalks.
Failed to note host, but it was a dead branch, probably tanoak, fir, redwood, Doug fir, or Bishop pine. Small, maybe 1 cm in diameter.
Reddish stem, growing on a stream bank.
Whittemore's Bay Area key depends on capsule characters and microscopic stuff, so either P. commune, P. alpinum, or P. lyallii.
Maybe minimum, but I don't think I've seen that with that depression on the top side of the aperture before. Is this what Pilsbry describes as "sinuate"?