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Lemnaceae
Close up of two different duckweeds: Spirodela polyrrhiza and Wolffia globosa.The very tiny Wolffia plants are under 2 mm long
Close up of two different duckweeds:
Spirodela polyrrhiza and Wolffia globosa.
The very tiny Wolffia plants are under 2 mm long
Scientific classification
Kingdom: Plantae
Division: Magnoliophyta
Class: Liliopsida
Order: Arales
Family: Lemnaceae
Genus

Lemnaceae is a family of flowering plants, also known as the duckweed family, as it contains the duckweeds or water lentils. Plants are living Organisms belonging to the kingdom Plantae. The flowering plants or angiosperms ( Angiospermae or Magnoliophyta) are the most widespread group Liliopsida is a Botanical name for the class containing the family Liliaceae (or Lily Family Arales is a Botanical name for an order of Flowering plants. The name was used in the Cronquist system for an order placed in subclass Spirodela is a genus of Aquatic plant, commonly called Duckweed. Landoltia punctata is a species of Duckweed ( Lemnaceae) The genus Landoltia is morphologically intermediate between Lemna and Lemna is a genus of free-floating Aquatic plants from the Duckweed family The flowering plants or angiosperms ( Angiospermae or Magnoliophyta) are the most widespread group The duckweeds are now known to be a branch of the arum or aroid family (Araceae), so the name 'Lemnaceae' is rapidly falling out of use among botanists. The arums comprise the Family Araceae (including the numerous Aroids subfamily monocotyledonous Flowering plants in which Flowers

These plants are very simple, lacking an obvious stem or leaves, but consist of a small 'thalloid' or plate-like structure that floats on or just under the water surface, with or without simple rootlets. The plants have become highly reduced from their relatives in Araceae. The arums comprise the Family Araceae (including the numerous Aroids subfamily monocotyledonous Flowering plants in which Flowers Reproduction is mostly by budding, but occasionally a flower consisting of two stamens and a pistil is produced (some view the 'flower' as a pseudanthium, or reduced inflorescence, with three unisexual flowers, derived from the spadix in Araceae). A flower, also known as a bloom or Blossom, is the reproductive structure found in Flowering plants (plants of the division Magnoliophyta, also A pseudanthium (Greek false flower is a special type of Inflorescence, in which several Flowers are grouped together to form a flower-like structure An inflorescence is a group or cluster of Flowers arranged on a stem that is composed of a main Branch or a complicated arrangement of branches In Botany, a spadix (pl spadices) is a type of spike: an Inflorescence with small Flowers crowded on a thickened fleshy axis The arums comprise the Family Araceae (including the numerous Aroids subfamily monocotyledonous Flowering plants in which Flowers The fruit is a utricle, a sac containing air and a seed designed to float. The term fruit has different meanings dependent on context and the term is not synonymous in Food preparation and Biology. An achene is a type of simple dry Fruit produced by many species of Flowering plants Achenes are "monocarpellate" (formed from one Carpel The flower of the Wolffia currently holds the record for being the smallest flower in world; measuring in at a size of 0. 3 mm long.

Duckweed is an important food source for waterfowl and are eaten by humans in some parts of Southeast Asia (as khai-nam). See also UK Wildfowl and Wetlands Trust USA Ducks Unlimited Some duckweeds are used in freshwater aquariums and ponds where they may spread rapidly, although in a large pond they may be difficult to eradicate once established. An aquarium (plural aquariums or aquaria) is a Vivarium consisting of at least one transparent side in which Water -dwelling Plants The plants can provide nitrate removal (if cropped) and cover for fry. In Inorganic chemistry, a nitrate is a salt of Nitric acid with an Ion composed of one Nitrogen and three Oxygen atoms The plants are used as shelter by pond water species, such as bullfrogs and bluegills. The American Bullfrog ( Rana catesbeiana) is an aquatic Frog, a member of the family Ranidae, or "true frogs" native to much of North For the exoatmospheric nuclear test refer to Bluegill (nuclear test. The duckweeds are important in the process of bioremediation because they grow rapidly, absorbing excess mineral nutrients, particularly nitrogen and phosphates. Bioremediation can be defined as any process that uses Microorganisms Fungi, green plants or their Enzymes to return the natural environment altered Nitrogen (ˈnaɪtɹəʤɪn is a Chemical element that has the symbol N and Atomic number 7 and Atomic weight 14 A phosphate, an Inorganic chemical, is a salt of Phosphoric acid. A cover of duckweeds will reduce evaporation of water compared to a clear surface. Evaporation is the process by which Molecules in a Liquid state (e

Contents

Taxonomy

Classification of the duckweeds in the family Lemnaceae is recognized by most systems of plant classification. This list of systems of plant taxonomy presents “taxonomic systems” used in plant classification It is not recognized by the APG II system, which places the duckweeds in the aroid family the Araceae as subfamily Lemnoideae. The arums comprise the Family Araceae (including the numerous Aroids subfamily monocotyledonous Flowering plants in which Flowers The genera of duckweeds are: Spirodela, Landoltia, Lemna, Wolffiella, and Wolffia. Spirodela is a genus of Aquatic plant, commonly called Duckweed. Landoltia punctata is a species of Duckweed ( Lemnaceae) The genus Landoltia is morphologically intermediate between Lemna and Lemna is a genus of free-floating Aquatic plants from the Duckweed family

Common duckweed in Galicia, Spain

Lemna minor

Lemna trisulca

Lemna gibba. Galicia (occasionally Galiza) is an autonomous community in northwest Spain.

See also

References

External links

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