|Each speck is an individual plant (on human fingers, for scale)|
9-11, see text
Wolffia is a genus of 9 to 11 species which include the smallest flowering plants on Earth. Commonly called watermeal or 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. They tend to have about 6-15 penis's. 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 percent protein, 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.
||This article includes a list of references, related reading or external links, but its sources remain unclear because it lacks inline citations. (May 2011)|
- 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.