Flower Database

Japanese knotweed

Basic information
Flower Name
Japanese knotweed
Formal Name
Fallopia japonica
Alias
虎杖, Japanese knotweed
Habitat
East Asia
Morph
perennial plant
Comment
Japanese knotweed (scientific name:Fallopia japonica) is a perennial species of the family polygonaceae , genus Fallopia native to East Asia. It grows wild in the fields and mountains of Japan from Hokkaido to Kyushu. It is known as the pioneer plant which takes root in the early growth of rhizomes strong in the place where there was natural disaster. The stem is hollow. The triangular leaves are each other, and there are wave in the edge.
It lets quiet white blossoms bloom in the fields and mountains in autumn from summer. Aafter flowers , white fruits become and are the anemophilous flowers which there are the seeds with the wing in autumn and are scattered by wind and spread. The flower name depends on getting a pain when It adds the liquid which massaged a leaf to a wound. The hollow big stem and bud become the spring edible wild plant. It is cooked after pulling lye because acidity is strongly sour, and doing it.
Generic name: Japanese knotweed
Scientific name:Fallopia japonica
Origin:East Asia, distribution: from Hokkaido to Kyushu in Japan, environment: Fields and mountains , height of plant: 150-200cm, a blade: 5-15cm, leaf shape: A triangle, a phyllotaxis: Each other , a leaf edged: wave pattern, dioecism, inflorescence form: A compound raceme, a petal: nothing , tepal: 5divisions, perianth : white - crimson, diameter:1cm, anthesis: For from July to October, fruit type: achene, fruit form: An obovoid form, the fruit head: 0.5-1cm, a seed: Spatule.
Detailed information
Order
Caryophyllales
Family
Polygonaceae
Genus
Fallopia
Species
F. japonica
Flower type
Actinomorphic Flower
Flower array
Panicle
Petal shape
no petal
Leaf type
Triangle
Leaf edge
Repand
Flowering place
Plain/fleet
Color
Red, Pink, White
Season
Jul Aug Sep Oct
Height
150  ~ 200  [cm]
Diameter
1  ~ 1.5