Fallopia X Bohemica

국표에는 없다.

Habitat: Terrestrial
Distribution in Ireland: Extensive

Status: Established

Family name: Polygonaceae

Bohemian knotweed Leaf

Reproduction: This species mostly spreads by vegetive means through stem and root fragments and is usually found in disturbed areas such as flood zones railway sidings and roadsides. 

Most Bohemian knotweed plants are males and lack seeds.​

 

However, more recently, seed-bearing hybrids have appeared, indicating a back-cross with Giant knotweed or Japanese knotweed. The existence of seeding hybrids may mean that this plant will begin to spread even more rapidly in the future.

Bohemian knotweed is a hybrid between Giant knotweed and Japanese Knotweed, sharing characteristics of both parent species. It was introduced to Ireland as an ornamental plant but has become widespread as a pest plant, especially along rivers and roadways.

Leaves can be either spade or heart-shaped, usually more heart-shaped lower down on the stems and more spade-shaped near the branch ends.

 

This variability in leaf shape is one identifying character since the parent species generally have either heart-shaped or spade-shaped leaves.

The leaves are also intermediate in texture between the parent species - thicker and rougher than Giant knotweed but less so than Japanese knotweed. On flowering stems, leaf tips are characteristically long and gradually tapered.

Leaves can be either spade or heart-shaped, hairs on the leaf undersides especially along the mid-vein
Flower: creamy white to greenish white
Stem: reddish-brown and usually branched. stem nodes are swollen and surrounded by thin papery sheaths

Seed: The fruit is 3-sided, black and shiny

Bohemian knotweed | Japanese Knotweed Control | Eradication (japaneseknotweedkillers.com)

2019.10.17 vladvostok 에서