Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Caryophyllales
WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/24/22):
Koenigia polystachya
FAMILY
Polygonaceae
Go to FSUS key
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.
(?)
PLANTS NATIONAL DATABASE:
Polygonum polystachyum
FAMILY
Polygonaceae
INCLUDED WITHIN Floristic Synthesis of North America. BONAP (Kartesz, 2015)
Persicaria wallichii
SYNONYMOUS WITH Flora of North America north of Mexico, vol. 5 (2005)
Persicaria wallichii var. wallichii
INCLUDED WITHIN Britton & Brown Illus Flora of Northeast US & adjacent Canada (Gleason, 1952)
Polygonum polystachyum
(?) 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 OF THE SOUTHEASTERN US (4/24/22):
Koenigia polystachya
FAMILY
Polygonaceae
(?)
PLANTS NATIONAL DATABASE:
Polygonum polystachyum
FAMILY
Polygonaceae
INCLUDED WITHIN
Floristic Synthesis of North America. BONAP (Kartesz, 2015)
Persicaria wallichii
SYNONYMOUS WITH
Flora of North America north of Mexico, vol. 5
Persicaria wallichii var. wallichii
INCLUDED WITHIN
Britton & Brown Illus Flora of Northeast US & adjacent Canada (Gleason, 1952)
Polygonum polystachyum
(?) INCLUDED WITHIN
-
Aconogonon polystachyum
(?) INCLUDED WITHIN
-
Reynoutria polystachya
3932
Forb (sometimes somewhat woody at base)
Perennial
Habitat: Persistent and spreading from plantings, per Weakley's Flora
Non-native: Himalayan Asia
Waif(s)
CLICK HERE to see a map, notes, and images from Weakley's Flora of the Southeastern US.
IS THE PLANT "ARMED"?
Stems, petioles and leaves unarmed
LEAVES:
Simple
Alternate
FLOWER:
Summer/Fall
Calyx white
5-lobed rotate calyx
Petals absent
8 stamens
Superior ovary
Bisexual
Inflorescence paniclelike, mostly terminal, sometimes also axillary
FRUIT:
Achene
TO LEARN MORE about this plant, look it up in a good book!
If a search such as "Carex leptalea var. leptalea" doesn't deliver the results you want, try "Carex leptalea".
Or, to minimize chances of a misspelling, try just "Carex le".
Less is more: If "pencil flower" doesn't deliver the results you want, try "pencil".