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
Dig deeper at SERNEC, a consortium of southeastern herbaria.
Check out EDDMapS.org to see where this has been reported.
Read more about Prostrate Knotweed at Vascular Plants of North Carolina.
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.
)
USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913 pnd_poav_001_lvd
)
USDA-NRCS PLANTS Database / USDA Wetland flora: Field office illustrated guide pnd_poav_003_lvd
)
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).
)
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).
)
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).
)
JK Marlow jkm190903_1215
September Greenville County SC
Viewed from underneath.
)
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
1119
Forb
Annual
Habitat: Disturbed areas, per Weakley's Flora
Non-native: Eurasia
Uncommon
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!
- Newcomb's Wildflower Guide (Newcomb, 1977) p192
- Field Guide to the Rare Plants of Georgia (Chafin, 2007) p283
- Wildflowers of the Atlantic Southeast (Cotterman, Waitt, & Weakley, 2019) p208
- Weeds of Southern Turfgrasses (Murphy et al., 1992) p163