OF THE CAROLINAS & GEORGIA

Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Caryophyllales

WEAKLEY'S FLORA (4/24/22):
Koenigia polystachya   FAMILY Polygonaceae   NEW! Click to go to FSUS key


(?) INCLUDED WITHIN PLANTS NATIONAL DATABASE:
Polygonum polystachyum   FAMILY Polygonaceae

SYNONYMOUS WITH Flora of North America
Persicaria wallichii var. wallichii

INCLUDED WITHIN The Biota of North America Program. BONAP (Kartesz, 2015)
Persicaria 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.

image of Koenigia polystachya, Himalayan Knotweed, Kashmir Plume, cultivated knotweed

Ron Lance    rwl_4284

September    Haywood County    NC

Roadside

Inflorescences paniclelike, mostly terminal and sometimes also axillary, per Flora of North America.

image of Koenigia polystachya, Himalayan Knotweed, Kashmir Plume, cultivated knotweed

Ron Lance    rwl_4285

September    Haywood County    NC

Roadside

image of Koenigia polystachya, Himalayan Knotweed, Kashmir Plume, cultivated knotweed

Ron Lance    rwl_4286

September    Haywood County    NC

Roadside

image of Koenigia polystachya, Himalayan Knotweed, Kashmir Plume, cultivated knotweed

Ron Lance    rwl_4286b

September    Haywood County    NC

Roadside

image of Koenigia polystachya, Himalayan Knotweed, Kashmir Plume, cultivated knotweed

Ron Lance    rwl_4287

September    Haywood County    NC

Roadside

This particular patch is about 60' long by 20' wide.

image of Koenigia polystachya, Himalayan Knotweed, Kashmir Plume, cultivated knotweed

Ron Lance    rwl_4288

September    Haywood County    NC

Roadside

image of Koenigia polystachya, Himalayan Knotweed, Kashmir Plume, cultivated knotweed

Ron Lance    rwl_4289

September    Haywood County    NC

Roadside

Leaf blade lanceolate to elliptic-lanceolate, without dark blotch, per Flora of North America.

image of Koenigia polystachya, Himalayan Knotweed, Kashmir Plume, cultivated knotweed

Ron Lance    rwl_p_polystachyum

October    Haywood County    NC

This patch is about 15' wide by 60' long.

 

WEAKLEY'S FLORA (4/24/22):
Koenigia polystachya   FAMILY Polygonaceae

(?) INCLUDED WITHIN PLANTS NATIONAL DATABASE:
Polygonum polystachyum   FAMILY Polygonaceae

SYNONYMOUS WITH Flora of North America
Persicaria wallichii var. wallichii

INCLUDED WITHIN The Biota of North America Program. BONAP (Kartesz, 2015)
Persicaria wallichii

INCLUDED WITHIN Britton & Brown Illus Flora of Northeast US & adjacent Canada (Gleason, 1952)
Polygonum polystachyum

(?) INCLUDED WITHIN -
Aconogonon polystachyum

(?) INCLUDED WITHIN -
Reynoutria polystachya

 

Find by SCIENTIFIC NAME:

3932

Forb (sometimes somewhat woody at base)
Perennial

Non-native: Himalayan Asia

Waif(s)

Habitat: Persistent and spreading from plantings, per Weakley's Flora

map
NEW! Click here to see a map from Weakley's Flora of the Southeastern US showing range and abundance.

Click here to see a map showing all occurrences known to SERNEC, a consortium of southeastern herbaria. (Zoom in to see more detail.)

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!



 


Find by SCIENTIFIC NAME: