On the bark of an oak tree. Leaves about 2 mm long, numerous julaceous branches, weak supplementary costae.
Growing on a very old piece of cinder block. I can't find anything exactly like it in Malcolm, Shevock & Norris. Leaves mostly 1.5 x 0.65 mm. Cells hexagonal in midleaf 70 x 21 µm, rectangular at base 90 x 15 µm. Border two rows of narrow cells.
Recent flooding left a bunch of crayfish stranded after a creek overflowed near the pond.
On a large seasonally moist rock in the Russian River Bed. Leaves mostly 3 - 3.8 mm long.
Virtually covering a mown path on sandy clay.
Found on a large seasonally submerged rock on the bank of the Russian River.