The local urgent vet referred me to poison control, which was not immediately aware of poke, so more PSA (incl. humans): small ingestion: for the next 12 hours try to stay hydrated, take sugar and salt. Ice broth chips. Get to an MD for gastric and cardiac check.
Larger ingestion: get to an MD for emergency hydration and cardiac support. Poke puts a LOT of stress on the guts and heart. No one needs to deal with that and some won't be up to it.
Ok, done, sorry to be a bummer.
@TrueBloodNet I dug it up and he grabbed it (stick!). Just that mouthing is all it took. Can't overstress: don't trifle with this plant.
@b4cks4w Someone cooked it and the doggo ate it? :(