By weight:
* Orchids: Some orchids produce seeds that are microscopic, weighing less than a millionth of a gram. These seeds are essentially just a single cell with a protective coating.
By size:
* Duckweed: This aquatic plant has tiny seeds that are barely visible to the naked eye.
So, the answer depends on what you're measuring!
It's worth noting that there are other plants with incredibly tiny seeds, including:
* Ferns: Ferns produce spores, which are even smaller than seeds.
* Mosses: Mosses also reproduce with spores, and some have very small spores.
Ultimately, the answer to your question is a bit of a scientific debate!
