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.
Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Caryophyllales
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
COMMON NAME:
Giant Knotweed, Sachaline
Click or hover over the thumbnails to see larger pictures.
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JK Marlow jkm160827_722
August Henderson County NC
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JK Marlow jkm160827_723
August Henderson County NC
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JK Marlow jkm150927_277
September Henderson County NC
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JK Marlow jkm150927_279
September Henderson County NC
Stems usually clustered, erect, sparely branched, herbaceous, stiff, glabrous, per Flora of North America.
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JK Marlow jkm150927_281
September Henderson County NC
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JK Marlow jkm150927_284
September Henderson County NC
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JK Marlow jkm150927_286
September Henderson County NC
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JK Marlow jkm150927_290
September Henderson County NC
Inflorescences axillary, mostly distal, erect or spreading, paniclelike, per Flora of North America.
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JK Marlow jkm150927_290b
September Henderson County NC
Fruiting perianth glabrous, wings flat to undulate, margins entire, per Flora of North America.
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JK Marlow jkm150927_293
September Henderson County NC
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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.
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JK Marlow jkm150927_298
September Henderson County NC
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JK Marlow jkm150927_300
September Henderson County NC
Ocrea persistent or deciduous, brownish, cylindric, 6-12mm, margins oblique, per Flora of North America.