According to an article in the New York Times by Veronique Greenwood, duckweeds are humble-looking plants whose tiny, brilliant green globules spangle ponds all over the world. Some duckweeds are the smallest flowering plants in nature. If one duckweed lands where a bird relieves itself, it’s capable of eventually creating a dense mat of duckweeds where there were none before. Brazilian scientists have found one duckweed that can likely hop entirely intact from wetland to wetland by hitching a ride in the feces of birds.
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