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The lotus plant's roots can be eaten. Other plant I'm not really sure
Watercress.
people
Yes!
The trophic pyramid of seaweed would include seaweed as a producer in the area at the base of the pyramid. The seaweed is followed by grazing creatures that eat seaweed and are then eaten by predators.
kelp, seaweed.....
Watercress comes from Europe and Asia. It is one of the oldest know leaf vegetables eaten by humans. It is an aquatic plant found near springs an slow moving streams.
The leafy part of a seaweed is called the blade.
Seaweed such as kelp.
Agar comes from algae. It is used to culture bacteria and can be eaten by humans as a substitute for gelatin.
Here are a few examples: lettuce, spinach, watercress, dandelion greens (the leaves).
Water plants eaten as foods include: Dulse (edible seaweed) Nori (edible seaweed, used in sushi maki rolls) Irish moss (contains carrageenan, a food additive) Sea cucumber Laver (edible seaweed)