Close up of two different duckweeds:
Spirodela polyrrhiza and Wolffia globosa.
The very tiny Wolffia plants are under 2 mm long

Lemnaceae is a botanical name for a family of flowering plants. It is also known as the "duckweed family", as it contains the duckweeds (also known as water lentils). Download high resolution version (1200x900, 267 KB)Photograph of two species of duckweeds (Wolffia globosa and Sprodella polyrrhiza) taken in Waimanalo, Hawai‘i by Eric Guinther. ... Download high resolution version (1200x900, 267 KB)Photograph of two species of duckweeds (Wolffia globosa and Sprodella polyrrhiza) taken in Waimanalo, Hawai‘i by Eric Guinther. ... A botanical name is a formal name conforming to the ICBN. As with its zoological and bacterial equivalents it may also be called a scientific name. Botanical names may be in one part (genus and above), two parts (species) or three parts (below the rank of species). ... Classes Magnoliopsida - Dicots Liliopsida - Monocots The flowering plants (also angiosperms or Magnoliophyta) are one of the major groups of modern plants, comprising those that produce seeds in specialized reproductive organs called flowers, where the ovulary or carpel is enclosed. ...

These plants are very simple, lacking a stem or leaves, but consisting of a small blade-like structure floating on or just under the water surface, with or without simple rootlets. Reproduction is mostly by budding, but occasionally a flower consisting of two stamens and a pistil (some call it an inflorescence with three unisexual flowers) is produced. The fruit is an utricle, a sac containing air and a seed designed to float. The flower of Wolffia is the smallest in the world at 0.3 mm long. Clivia miniata bears bright orange flowers. ... An inflorescence is a group or cluster of flowers on a branch of a plant. ... Fruit stall in Barcelona, Catalonia. ... Otolith organ Utricle is also a fruit type, found in beet and dock. ...

Duckweeds are an important food source for waterfowl and are eaten by humans in parts of Southeast Asia (as khai-nam). Some duckweeds are used in freshwater aquariums and ponds where they may spread rapidly, although in a large pond may be difficult to eradicate once established. The plants can provide nitrate removal (if cropped) and cover for fry. The plants are used as shelter by pond water species, such as bullfrogs and bluegills. The duckweeds are important in the process of bioremediation because they grow rapidly, absorbing excess mineral nutrients, particularly nitrogen and phosphates. A cover of duckweeds will reduce evaporation of water compared to a clear surface. Location of Southeast Asia Southeast Asia is a subregion of Asia. ... For other uses, see Aquarium (disambiguation). ... In inorganic chemistry, a nitrate is a salt of nitric acid. ... Bioremediation can be defined as any process that uses microorganisms, fungi, green plants or their enzymes to return the environment altered by contaminants to its original condition. ... General Name, Symbol, Number nitrogen, N, 7 Chemical series nonmetals Group, Period, Block 15, 2, p Appearance colorless Atomic mass 14. ... In chemistry, a phosphate is a polyatomic ion or radical consisting of one phosphorus atom and four oxygen. ...

Taxonomy

Such a family has been recognized by most systems of plant classification, but it is not recognized by the APG II system: this refers the plants involved to family Araceae, the aroid family. This list of systems of plant taxonomy presents “taxonomic systems” used in plant classification. ... A modern system of plant taxonomy, the APG II system of plant classification was published in 2003 by the Angiosperm Phylogeny Group, APG, in Angiosperm Phylogeny Group (2003). ... Genera See text. ...

Common duckweed in Galicia, Spain Image File history File linksMetadata Download high resolution version (1600x1200, 622 KB) Summary Lemnaceae Photo taken in Galicia, Spain Licensing File links The following pages link to this file: Lemnaceae Metadata This file contains additional information, probably added from the digital camera or scanner used to create or digitize it. ... There are two well-known places called Galicia: Galicia (Spain), an autonomous community in Spain. ...

Lemna minor Image File history File links Lemna_minor1. ...

Lemna trisulca Wikipedia does not have an article with this exact name. ...

See also

Wikimedia Commons has media related to:

Lemnaceae

• Lemna
• Landoltia punctata
• Spirodela
• Wolffia

Image File history File links Commons-logo. ... The Wikimedia Commons (also called Commons or Wikicommons) is a repository of free content images, sound and other multimedia files. ... Species Lemna gibba : Gibbous Duckweed Lemna minuta Lemna minor : Common Duckweed Lemna trisulca : Ivy Duckweed Lemna is genus of free-floating aquatic plants from the family Araceae, often referred to as the duckweeds. ... Landoltia punctata is a species of duckweed (Lemnaceae). ... Species Spirodela intermedia Spirodela polyrhiza Spirodela punctata Spirodela is a genus of aquatic plant, commonly called duckweed. ... Species of the genus Wolffia are the smallest flowering plants. ...

References

• 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.

External links

• Wayne Armstrong's treatment of the Lemnaceae and allies
• Lemnaceae in Watson, L. and M.J. Dallwitz (1992 onwards). The families of flowering plants: descriptions, illustrations, identification, information retrieval. Version: 3rd May 2006. http://delta-intkey.com