Diphasiastrum digitatum (fan clubmoss aka groundcedar, ground cedar, running cedar or crowsfoot)

Synonyms:

Lycopodium digitatum Dillen. ex A. Braun 1848

Diphasium flabelliforme (Fern.) Rothm.

Lycopodium complanatum L. var. flabelliforme Fern.

Lycopodium flabelliforme (Fern.) Blanch

Lycopodium flabelliforme var. ambiguum Victorin

https://en.wikipedia.org/wiki/Diphasiastrum_digitatum - needs lots of citations, especially wrt propagation

2016 growing on banks to west side of driveway.