Wolffia

Wolffia is a genus of nine to 11 species which include the smallest flowering plants on Earth. Commonly called watermeal' or '(mistakenly)duckweed, these aquatic plants resemble specks of cornmeal floating on the water. Wolffia species are free-floating thalli, green or yellow-green, and without roots. The flower is produced in a depression on the top surface of the plant body. It has one stamen and one pistil. Individuals often float together in pairs or form floating mats with related plants, such as Lemna and Spirodela species. Most species have a very wide distribution across several continents. Wolffia species are composed of about 40% protein on a dry-matter basis, about the same as the soybean, making them a potential high-protein human food source. They have historically been collected from the water and eaten as a vegetable in much of Asia.

Wolffia
Each speck is an individual plant
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Alismatales
Family: Araceae
Subfamily: Lemnoideae
Genus: Wolffia
Schleid.
Species

9-11, see text

Close-up of two different duckweeds: Spirodela polyrrhiza and Wolffia globosa: The very tiny Wolffia plants are under 2 millimetres (0.079 in) long.

Selected species
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gollark: I'm pretty sure I've seen diagrams of pronounceable things of some kind, but they're more complex than just permutations of "high tone, low tone" and do not conveniently map to concepts.
gollark: What do you mean "all of the possible forms of a square diagram with two or more sides"? There are infinitely many of those. And how do I just pronounce a diagram without a predetermined mapping?
gollark: Also, I have no idea what an "objective → semantic buffer" is and I think you're underestimating the difficulty of implementing whatever it is.
gollark: I can't actually source this, having checked *at least* two internet things.

References

    Further reading
    • Treatment:Lemnaoideae, Wayne P. Armstrong, from The Jepson Manual
    • Wolffia Horkel ex Schleid, a USDA Plants Profile
    • The Duckweed Genome Project from Rutgers University
    • Armstrong, W. (2005). "Wayne Armstrong's treatment of the Lemnaceae". Palomar Community College District. Retrieved 2011-05-01.
    • Cross, J.W. (September 6, 2008). "The Charms of Duckweed". Missouri Botanical Garden. Retrieved 2011-05-01.
    • Landolt, E. (1986) Biosystematic investigations in the family of duckweeds (Lemnaceae). Vol. 2. The family of Lemnaceae - A monographic study. Part 1 of the monograph: Morphology; karyology; ecology; geographic distribution; systematic position; nomenclature; descriptions. Veröff. Geobot. Inst., Stiftung Rübel, ETH, Zurich.
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