Green plant matter is food eaten by herbivores and is found in the early cell stage. Small bits normally float around in a freelance form, scattered across the world. However, clusters of 15-20 are sometimes attached to 5-6 bigger clusters that are only edible when one grows one size larger, and these clusters are attached to a floating green plant matter. Plant matter can be eaten with herbivore and omnivore mouths. Carnivore-mouthed cells cannot digest them. They are reasonably small and any peer sized cell can eat them. There is several forms in different sizes. Plant matter will get smaller and then disappear as cells get bigger.
Plant matter on clusters is worth less than free floating plant matter.