OF THE CAROLINAS & GEORGIA

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

WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/24/22):
Polygonum aviculare ssp. aviculare   FAMILY Polygonaceae   Go to FSUS key


SYNONYMOUS WITH PLANTS NATIONAL DATABASE:
Polygonum aviculare   FAMILY Polygonaceae

SYNONYMOUS WITH Floristic Synthesis of North America. BONAP (Kartesz, 2021)

Polygonum aviculare ssp. aviculare

SYNONYMOUS WITH Flora of North America

Polygonum aviculare ssp. aviculare

SYNONYMOUS WITH VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 063-04-003:

Polygonum aviculare   FAMILY Polygonaceae

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

Polygonum aviculare

SYNONYMOUS WITH Manual of the Southeastern Flora (Small, 1933, 1938)

Polygonum aviculare

 

COMMON NAME:
Prostrate Knotweed


         To see larger pictures, click or hover over the thumbnails.

image of Polygonum aviculare ssp. aviculare, Prostrate Knotweed

USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913    pnd_poav_001_lvd

        

image of Polygonum aviculare ssp. aviculare, Prostrate Knotweed

USDA-NRCS PLANTS Database / USDA Wetland flora: Field office illustrated guide    pnd_poav_003_lvd

        

image of Polygonum aviculare ssp. aviculare, Prostrate Knotweed

Terry Holdsclaw    tdh_p_aviculare_aviculare

June    Iredell County    NC

Sheaths [ocreae] silvery. Plant usually prostrate, sometimes erect, per Newcomb's Wildflower Guide (Newcomb, 1977).

image of Polygonum aviculare ssp. aviculare, Prostrate Knotweed

JK Marlow    jkm190903_1211

September    Greenville County    SC

Much branched, usually trailing radially from the taproot, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).

image of Polygonum aviculare ssp. aviculare, Prostrate Knotweed

JK Marlow    jkm190903_1214

September    Greenville County    SC

Leaves blue-green, lanceolate to elliptic, 1-3cm or less long, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).

image of Polygonum aviculare ssp. aviculare, Prostrate Knotweed

JK Marlow    jkm190903_1215

September    Greenville County    SC

Viewed from underneath.

image of Polygonum aviculare ssp. aviculare, Prostrate Knotweed

JK Marlow    jkm190903_1216

September    Greenville County    SC

Viewed from underneath. Taproot at bottom.

 

WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/24/22):
Polygonum aviculare ssp. aviculare   FAMILY Polygonaceae

SYNONYMOUS WITH PLANTS NATIONAL DATABASE:
Polygonum aviculare   FAMILY Polygonaceae

SYNONYMOUS WITH Floristic Synthesis of North America. BONAP (Kartesz, 2021)
Polygonum aviculare ssp. aviculare

SYNONYMOUS WITH Flora of North America
Polygonum aviculare ssp. aviculare

SYNONYMOUS WITH VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 063-04-003:
Polygonum aviculare   FAMILY Polygonaceae

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

SYNONYMOUS WITH Manual of the Southeastern Flora (Small, 1933, 1938)
Polygonum aviculare

 

Find by SCIENTIFIC NAME:

1119

Forb
Annual

Habitat: Disturbed areas, per Weakley's Flora

Non-native: Eurasia

Uncommon

map
Click here to see a map, notes, and images from Weakley's Flora of the Southeastern US.

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

LEAVES:
Simple
Alternate

FLOWER:
Spring/Summer/Fall
Greenish with a broad white or pink margin
Bisexual
5-parted calyx
Petals absent
Superior ovary

FRUIT:
Spring/Summer/Fall
Reddish-brown
Nutlet

 

TO LEARN MORE about this plant, look it up in a good book!



 


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