Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Caryophyllales
WEAKLEY'S FLORA (5/21/15):
Persicaria wallichii var. wallichii
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 Himalayan Knotweed at Vascular Plants of North Carolina.
(?) INCLUDED WITHIN
PLANTS NATIONAL DATABASE:
Polygonum polystachyum
FAMILY
Polygonaceae
INCLUDED WITHIN
-
Aconogonon polystachyum
INCLUDED WITHIN
-
Reynoutria polystachya
COMMON NAME:
Himalayan Knotweed, Kashmir Plume, cultivated knotweed
To see larger pictures, click or hover over the thumbnails.
)
Ron Lance rwl_4284
September Haywood County NC
Roadside
Inflorescences paniclelike, mostly terminal and sometimes also axillary, per Flora of North America.
)
Ron Lance rwl_4285
September Haywood County NC
Roadside
)
Ron Lance rwl_4286
September Haywood County NC
Roadside
)
Ron Lance rwl_4286b
September Haywood County NC
Roadside
)
Ron Lance rwl_4287
September Haywood County NC
Roadside
This particular patch is about 60' long by 20' wide.
)
Ron Lance rwl_4288
September Haywood County NC
Roadside
)
Ron Lance rwl_4289
September Haywood County NC
Roadside
Leaf blade lanceolate to elliptic-lanceolate, without dark blotch, per Flora of North America.
)
Ron Lance rwl_p_polystachyum
October Haywood County NC
This patch is about 15' wide by 60' long.
WEAKLEY'S FLORA (5/21/15):
Persicaria wallichii var. wallichii
FAMILY
Polygonaceae
(?) INCLUDED WITHIN
PLANTS NATIONAL DATABASE:
Polygonum polystachyum
FAMILY
Polygonaceae
INCLUDED WITHIN
-
Aconogonon polystachyum
INCLUDED WITHIN
-
Reynoutria polystachya
3932
Forb (sometimes somewhat woody at base)
Perennial
Non-native: Himalayan Asia
Documented growing wild in - NC -
Rare
Look for it to be persistent and spreading from plantings, 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.
IS THE PLANT "ARMED"?
Stems, petioles and leaves unarmed
LEAVES:
Simple
Alternate
FLOWER:
Summer/Fall
Calyx white
Bisexual
5-lobed rotate calyx
Petals absent
8 stamens
Superior ovary
Inflorescence paniclelike, mostly terminal, sometimes also axillary
FRUIT:
Achene
TO LEARN MORE about this plant, look it up in a good book!