I got to Marin Woods and cleared the first two purple tentacles areas with two of the green flowers but when I went back in today the tentacles had respawned but the flowers used to clear them out didn’t. So now I’m stuck at the beginning area of Marin Woods…
So the flowers will respawn after a bit, but the way around this is to open up shortcuts to bypass certain purple sections and then stock up on the flowers as you go to get past further spaces.