This was found in a landscaped/garden area in urban San Francisco, CA. It is growing on woodchips and possibly a piece of dung, possibly belonging to a housecat. Some hyphae seem to possess yellow contents, particularly just beneath the hymenium. The asci are 8-spored, seemingly inoperculate with inamyloid tips. The paraphyses tips appear to be apically encrusted. No septa were observed in the spores.

also at: http://ascofrance.com/forum/32802/yellow-discomycete

I found quite a few of these tiny, dark, sessile, purple cups. Most were in tight clusters, but there were some individual outliers. They grow on bare or mossy soil, not wood. Not a burn area to the best of my knowledge. This specimen was just under 3mm in diameter, but others grew to maybe a little over 1cm. They look almost black at first glance, but a close view with enough light reveals that they are clearly purple.

Immature specimens. Tried letting them grow to find more mature spores. Fery few ascus formed in each body. The most mature spores within those asci that I did find were large.
Spores 18-22 x 9-10.5 µm.

On Alnus ruber.

Skinny small spores 4.5-5.2 x 1 µm.

There were 'other' spores that may be contamination, but can't figure what. . .
. . . 6-7 x 4 µm (last photo) - others often had two oil-spots.