Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Caryophyllales
WEAKLEY'S FLORA (11/30/12):
Reynoutria sachalinensis
FAMILY
Polygonaceae
Dig deeper at SERNEC, a consortium of southeastern herbaria.
Check out EDDMapS.org to see where this has been reported.
Read more about Giant Knotweed at Vascular Plants of North Carolina.
SYNONYMOUS WITH
PLANTS NATIONAL DATABASE:
Polygonum sachalinense
FAMILY
Polygonaceae
SYNONYMOUS WITH
Flora of North America
Fallopia sachalinensis
SYNONYMOUS WITH
VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 063-04-024:
Polygonum sachalinense
FAMILY
Polygonaceae
COMMON NAME:
Giant Knotweed, Sachaline
To see larger pictures, click or hover over the thumbnails.
)
JK Marlow jkm160827_722
August Henderson County NC
)
JK Marlow jkm160827_723
August Henderson County NC
)
JK Marlow jkm150927_277
September Henderson County NC
)
JK Marlow jkm150927_279
September Henderson County NC
Stems usually clustered, erect, sparely branched, herbaceous, stiff, glabrous, per Flora of North America.
)
JK Marlow jkm150927_281
September Henderson County NC
)
JK Marlow jkm150927_284
September Henderson County NC
)
JK Marlow jkm150927_286
September Henderson County NC
)
JK Marlow jkm150927_290
September Henderson County NC
Inflorescences axillary, mostly distal, erect or spreading, paniclelike, per Flora of North America.
)
JK Marlow jkm150927_290b
September Henderson County NC
Fruiting perianth glabrous, wings flat to undulate, margins entire, per Flora of North America.
)
JK Marlow jkm150927_293
September Henderson County NC
)
JK Marlow jkm150927_297
September Henderson County NC
Leaf blade ovate-oblong, 15-30(-40)cm long, base cordate, margins entire, per Flora of North America.
)
JK Marlow jkm150927_298
September Henderson County NC
)
JK Marlow jkm150927_300
September Henderson County NC
Ocrea persistent or deciduous, brownish, cylindric, 6-12mm, margins oblique, per Flora of North America.
WEAKLEY'S FLORA (11/30/12):
Reynoutria sachalinensis
FAMILY
Polygonaceae
SYNONYMOUS WITH
PLANTS NATIONAL DATABASE:
Polygonum sachalinense
FAMILY
Polygonaceae
SYNONYMOUS WITH
Flora of North America
Fallopia sachalinensis
SYNONYMOUS WITH
VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 063-04-024:
Polygonum sachalinense
FAMILY
Polygonaceae
3805
Forb
Perennial
Non-native: east Asia
Documented growing wild in - NC -
Rare
Look for it in disturbed areas, on roadsides, per Weakley's Flora
Click here to see a more detailed map from University of North Carolina at Chapel Hill Herbarium,
or click here to see a map from SERNEC, a consortium of southeastern herbaria.
This plant may be causing problems in natural areas outside its native range, according to authorities such as:
LEAVES:
Simple
Alternate
Petioles 1-4cm long
Margins entire
FLOWER:
Summer
Calyx white
(rarely tinged with pink)
Bisexual or pistillate
4-parted calyx
Petals absent
6-8 stamens
Superior ovary
Flowers in axillary paniculate racemes
FRUIT:
Summer/Fall
Brown, lustrous
Nutlet
TO LEARN MORE about this plant, look it up in a good book!