Alternanthera philoxeroides

Family	Amaranthaceae
Scientific name	Alternanthera philoxeroides (C. Martius) Grisebach
Synonyms	Achyranthes philoxeroides (C. Martius) Standley; Alternanthera paludosa Bunbury; Alternanthera philoxerina Suessenguth; Alternanthera philoxeroides (C. Martius) Grisebach forma angustifolia Suessenguth; Alternanthera philoxeroides (C. Martius) Grisebach var. acutifolia (C. Martius ex Moquin-Tandon) Hicken; Alternanthera philoxeroides (C. Martius) Grisebach var. lancifolia Chodat; Alternanthera philoxeroides (C. Martius) Grisebach var. luxurians Suessenguth; Alternanthera philoxeroides (C. Martius) Grisebach var. obtusifolia (C. Martius ex Moquin-Tandon) Hicken; Bucholzia philoxeroides C. Martius; Telanthera philoxeroides (C. Martius) Moquin-Tandon; Telanthera philoxeroides (C. Martius) Moquin-Tandon var. acutifolia C. Martius ex Moquin-Tandon; Telanthera philoxeroides (C. Martius) Moquin-Tandon var. obtusifolia C. Martius ex Moquin-Tandon
Common name	(Japanese common name) naga-e-turu-no-geitou (ナガエツルノゲイトウ, 長柄蔓野鶏頭 [meaning: long stems field cockscomb])
	(English common name) alligator weed
Distribution	(Japan) Honshu (west of Kanto region), Shikoku, Kyushu, Okinawa
	(Other nations) [native] French Guiana, Guyana, Suriname, Venezuela, Bolivia, Peru, Argentina, Paraguay, Uruguay
Habitat	Riverside, wet field
Chromosomal number	2n=100
Description	Plants creeping ca. 1m long. Leaves 2.5-5cm long, 0.7-2cm wide. Flowers white 12-16mm across, flowering in April to October. Annual plants.
Reference	Alternanthera philoxeroides (Mart.) Griseb.
	Alternanthera philoxeroides (C. Martius) Grisebach
Note	Invasive plants. Naturalized plants, first discovered at Hyogo prefecture in 1989.

September 2006 at lowland field	September 2006 at lowland field	September 2006 at lowland field