With a few Lunularia. See my Lunularia observation for additional notes. https://www.inaturalist.org/observations/158509549
Next to sidewalk (but not in crack).
On side of sage scrub trail, in mixed cryptogamic mat along with mosses, Crassula connata, and Riccia trichocarpa. I often see Riccia spp. and Asterella palmeri around here but this is the first time I have seen Sphaerocarpos in a (relatively) non-anthropogenic habitat. This thallus was unaccompanied by visible conspecifics.
Pic 2 shows habitat. Note the way it avoids the mulch.
Pic 3 shows microhabitat.
Pic 3 shows microhabitat.
In bare patch of otherwise-weedy staff only area. Pic 2 shows habitat (note that the exact patch it was found in is not pictured).
In middle of artificial garden path. Specimen has been extracted for culturing.
On bare ground in the Australian Garden.
Very small, about 2 mm long. Found under a rock in a garden bed in a suburban backyard.
Across the road (but not directly across) from this tree:
https://www.inaturalist.org/observations/147445061
At roadside. Oddly enough, many other seemingly suitable Sphaerocarpos habitats at the H did not have any visible specimens.
Wrapped around 30-40 eggs