Apu-apu (Pistia stratiotes),

Apu-apu some people called kapu-kapu (Pistia stratiotes),

Pistia stratiotes

The Scientific classification of Pistia stratiotes
Kingdom:     Plantae
(unranked):     Angiosperms
(unranked):     Monocots
Order:     Alismatales
Family:     Araceae
Subfamily:     Aroideae
Tribe:     Pistieae
Genus:     Pistia L.

Species: P. stratiotes
Binomial name
Pistia stratiotes L.

Pistia distribution.svg
Range of the genus Pistia
Synonyms:
    Kodda-Pail Adans.
    Zala Lour.
    Apiospermum Klotzsch
    Limnonesis Klotzsch
    Zala asiatica Lour.
    Pistia spathulata Michx.
    Pistia crispata Blume
    Pistia leprieuri Blume
    Pistia linguiformis Blume
    Pistia minor Blume
    Pistia occidentalis Blume
    Pistia aegyptiaca Schleid.
    Pistia commutata Schleid.
    Pistia obcordata Schleid.
    Pistia horkeliana Miq.
    Pistia africana C.Presl
    Pistia amazonica C.Presl
    Pistia weigeltiana C.Presl
    Pistia turpinii K.Koch
    Apiospermum obcordatum (Schleid.) Klotzsch
    Limnonesis commutata (Schleid.) Klotzsch
    Limnonesis friedrichsthaliana Klotzsch
    Pistia aethiopica Fenzl ex Klotzsch
    Pistia brasiliensis Klotzsch
    Pistia cumingii Klotzsch
    Pistia gardneri Klotzsch
    Pistia natalensis Klotzsch
    Pistia schleideniana Klotzsch
    Pistia texensis Klotzsch

Apu - apu (Pistia stratiotes)

Pistia stratiotes

Apu apu or Pistia is a genus of aquatic plant in the arum family, Araceae. The single species it comprises, Pistia stratiotes, is often called water cabbage, water lettuce, Nile cabbage, or shellflower.

The water lettuce or apu-apu, (Pistia stratiotes) native distribution is uncertain, but probably pantropical; it was first discovered from the Nile near Lake Victoria in Africa. It is now present, either naturally or through human introduction, in nearly all tropical and subtropical fresh waterways. The genus name is derived from the Greek word πιστός (pistos), meaning "water," and refers to the aquatic nature of the plants.

This plant grows floating on the surface and the feathery roots trail a few cm’s into the water below. It can grow to about to 15 cm above water level, it needs little care, and multiplies rapidly. It can be used in ponds, and is attractive in a small pot by a doorway. As the name suggests, it looks like a small lettuce floating on the water. It needs no soil, simply throw it in to the pond or water bowl. If in a pond, fish will feed on the root system. It also helps by covering the pond surface, thus reducing evaporation, and restricting sunlight which will in turn reduce algae growth, particularly a problem in water bowls with no water reticulation system.

Sources : http://en.wikipedia.org/wiki/Pistia

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