Fallopia sachalinensis (F.Schmidt) Ronse Decr.

Giant Knotweed

Bot. J. Linn. Soc. 98: 369 (1988) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Sparingly established

Rhizomatous perennial to 4 m high; stems annual, erect, greenish, bamboo-like, usually clustered. Leaves ovate to oblong, 15–40 cm long, 7–25 cm wide, the lowers surface with scattered multicellular hairs; apex acute, rarely acuminate; base cordate; petiole 1–4 cm long. Inflorescence axillary, flowers in dense branched clusters. Perianth segments 4.5–6.5 mm long, free above c. midway, green to pale yellow, glabrous. Nut 2–3 mm long, brown, glossy, smooth.

*EGL, *GipP, *HNF, *HSF, *OtR, *Strz. Also naturalised NSW, ACT. Native to Asia.

Occasionally grown as a garden subject and has been noted outside of cultivation in the suburbs of Melbourne, Foster, and Beech Forest, but nowhere truly naturalised in this State (as in New South Wales).

See note under Fallopia japonica.

Created by: Andre Messina, 2015-06-01
Updated by: Val Stajsic, 2019-03-29
Distribution map


Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <http://avh.chah.org.au>. Find Fallopia sachalinensis in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Fallopia sachalinensis in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Victorian Volcanic Plain present cultivated
Gippsland Plain present introduced
East Gippsland Lowlands present introduced
Highlands-Southern Fall present introduced
Highlands-Northern Fall present introduced
Otway Ranges present introduced
Strzelecki Ranges present introduced

State distribution

Distribution map
New South Wales
Australian Capital Territory