Eichhornia crassipes




Family Pontederiaceae
Scientific name Eichhornia crassipes (Martius) Solms-Laubach
Synonyms Eichhornia speciosa Kunth; Piaropus crassipes (Martius) Rafinesque; Pontederia crassipes Martius
Common name (Japanese common name) hotei-aoi (ホテイアオイ, 布袋葵 [meaning: Hotei hollyhock (Hotei = one of the Seven Gods of Good Luck in China)])
(English common name) water-hyacinth, common water hyacinth
Distribution (Japan) Honshu, Shikoku, Kyushu, Okinawa
(Other nations) [native] French Guiana, Guyana, Suriname, Brazil, Venezuela
Habitat Pond, lake, river
Chromosomal number 2n=32
Description Leaves 5-20cm long, 5-18cm wide. Scapes 15-30cm tall. Flowers blue purple ca. 3-5cm across, flowering in June to October. Perennial plants.
Reference  Eichhornia crassipes (Mart.) Solms
Eichhornia crassipes (Martius) Solms
Method and compositions for controlling waterhyacinth (US Patent 4097261/1978)
Synergistic herbicidal compositions comprising colletotrichum truncatum and chemical herbicides (US Patent 4775405/1988)
Method for the manufacture of fodder and/or soil improving agents from waste material (US Patent 5198252/1993)
Water craft for reducing aquatic plant infestation (US Patent 5542240/1996)
Vascular plant aquaculture and bioremediation system and method (US Patent 5811007/1998)
Use of DHEA derivatives on keratinous substances (US Patent 6964954/2005)
7-Oxo-DHEA compounds for treating keratinous conditions/afflictions (US Patent 6846812/2005)
Heterocyclic derivatives of 2-oxothiazolidine-4-carboxylic acid, and use as active photoprotective agents (US Patent 7022317/2006)
Cosmetic and cosmeceutical compositions for restoration of skin barrier function (US Patent 7300649/2007)
Integrated system and method for purifying water, producing pulp and paper, and improving soil quality (US Patent 7267773/2007)
Note Naturalized plants.



October 2006
at Tsukuba Botanical Garden
October 2006
at Tsukuba Botanical Garden