Details of...
Scientific Name: Polygonum aviculare
Pronunciation: puh-LIG-uh-num uh-vick-you-LAIR-ee
Common Name: prostrate knotweed
Family Name: Polygonaceae
Plant Type: Annual, Weed (horticultural)
Key ID Features: Often found emerging from concrete cracks and growing horizontally (prostrate); leaves opposite, mostly elliptical and less than 4 mm wide x 9 mm long.
Course(s): not used (on campus)

Habit: Horizontal
Form: Creeping / Mat-like
Texture: Fine
Mature Size:
Height:< 0.1m
Spread:0.3 - 0.6m
Growth Rate:Fast
Origin: B.C. east of Cascades, B.C. west of Cascades, Canada - central, Canada - eastern, Canada - northern, Europe, U.S. - central, U.S. - northeast, U.S. - northwest, U.S. - southwest
Hardiness Rating: Zone 5: (-29 to -23 C)
Exposure: Full sun
Soil/ Growing Medium: Rocky or gravelly or dry
Landscape Uses:
Additional Info: Google
prostrate knotweed
Leaf Morphology: Glossary
Form: Simple
Arrangement: Alternate
Texture/ Venation: Soft flexible
Surfaces: Glabrous
Colour in Summer: Bluish, Green
Leaf(let) Terms:
Shapes: Elliptic
Apices: Acute
Bases: Cuneate
Margins: Entire

Inflorescence Type: Flowers clustered
Flower Morphology:Flowers perfect
Number of Petals:5
Corolla Shape:Funnelform
Ovary Position:Superior
Colour (petals): Not showy, White, Pink
Flower Time at Peak: May, Sep

Fruit Type: Achene
Fruit Colour: Red, Brown
Fruiting Time: Jun, Oct
Additional Info: Not showy

Bark or Stem Colour:
Organ Modifications: Storage tap root, Ocrea (thin membranous sheath encircling stem at each leaf base. Stems swollen at nodes.

Propagation: Seed
Pest Susceptibility: Rabbit resistant
(WDY) WeeDY location
Location Map

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