Fallopia sachalinensis

Stem and inflorescence. Reynoutria sachalinensis is a herbaceous perennial plant growing to 2–m (79–1in) tall, with strong, extensively spreading rhizomes forming large clonal colonies.

This robust rhizomatous perennial herb forms extensive thickets on waste groun roadsides, river banks and. Fallopia sachalinensis Ecology. World Distribution. L plastidial sequence analysis.

Friedrich Schmidt Petrop. NBN Atlas for this species. It is commonly known as Asian knotweed or Japanese knotweed. It is native to East Asia in Japan, China and Korea.

Introduced into Ireland as an ornamental for large gardens. Description Similar to Japanese knotweed. California, Oregon, and Washington. It hybridizes with F.

Authority: (Schmidt) Ronse Decraene. Cultivated as an ornamental and occasionally naturalized. Invasive in Britain. Regulated as an invasive species in Poland. WSSA list of weeds in North America. You can change the display of the base map and layers by clicking on the layer control box in the upper right-hand corner. Other scientific names. Find the perfect fallopia sachalinensis stock photo. No need to register, buy now! Taxonomic Serial No.

The hybrid between F. A rampant, rhizomatous perennial herb, locally forming thickets on waste groun roadsides, railway banks and on riversides. Male plants of this hybrid show some fertility, and more than one clone is present in some sites. Plants grow vigorously and create dense colonies that exclude other vegetation. Established colonies are extremely difficult to eradicate.

It inhabits disturbed moist sites, roadsides, riparian and wetland areas. It is now found almost everywhere, but usually in small, isolated stands.

It is a closely related species to Reynoutria japonica, but less widely distributed outside of the Far East.

Both male and female plants have been recorded in Europe and the UK. It is highly threatening to native plant communities.

Crosses between Japanese knotweed and giant knotweed have occurred where the two species grow in close proximity. It is becoming increasingly more frequent on the landscape. Both hermaphrodite and female individuals are known from Britain, though we know of no location where the two sexes grow together, and there are few places where male F. In winter the plant dies back to ground level but by early summer the bamboo-like stems emerge from rhizomes deep underground to shoot to over 2. It was brought to New Zealand as a garden plant by has now escaped to the wild and is now as an invasive species forming large clonal colonies.

To understand what is going on, it is important to know something about the cytology of these taxa.