Mag. 400x
16-cell colony. Each cell is tethered to a single stalk that converges, by tetrachotomous branching, in the center of the colony; there are 4 cells at the end of each major branchlet. The bottom frame in the composite photo (last photo) best shows the branching system. Compare to images here https://www.algaebase.org/search/species/detail/?species_id=176802&sk=0&from=results.
A pond edge water sample (freshwater) was taken on 10/1/2021 using a 10 micron dip net to enrich for microorganisms.