Details of...
Scientific Name: Centaurea stoebe
Pronunciation: sen-tore-EE-uh mak-yoo-LOH-suh
Common Name: spotted knapweed
Family Name: Asteraceae
Plant Type: Invasive plant, Biennial, Herbaceous perennial
Key ID Features: Leaves basal in its first year, deeply lobed to pinnified, once or twice on both sides of the center vein, with lobes oblong and wider toward the tip, up to 20 cm long x 5 cm wide; flower heads purple to pink, rarely white, with 25 to 35 florets per head, bracts have black margins or "spots", inflorescence 20 cm to over 1 m tall, branching with leaf-like bracts.
Course(s): not used (off campus)

Habit: Open, Upright
Form: Oval - vertical
Texture: Medium - fine
Mature Size:
Height:0.7 - 1.3m
Spread:0.3 - 0.6m
Origin: Europe, U.S. - northwest, U.S. - southwest
Hardiness Rating: Zone 5: (-29 to -23 C)
Soil/ Growing Medium:
Landscape Uses:
Additional Info: Google
spotted knapweed
Leaf Morphology: Glossary
Form: Dissected, Lobed, Simple
Arrangement: Alternate, Basal
Texture/ Venation: Pinnate venation, Soft flexible
Surfaces: Pubescent
Compound Leaf: Odd-pinnate
Leaf(let) Terms:
Shapes: Elliptic
Apices: Acute
Margins: Pinnately lobed

Inflorescence Type: Head (capitulum)
Flower Morphology:Flowers perfect
Corolla Shape:Ligulate
Ovary Position:Inferior
Colour (petals): Pink, Purple
Flower Time at Peak: Jun, Jul, Aug, Sep

Fruit Type: Achene
Fruit Colour: Brown
Fruiting Time: Aug, Sep, Oct
Bark or Stem Colour: n/a
Organ Modifications: Storage tap root

Pest Susceptibility: Pest resistant, Disease resistant, Rabbit resistant
(NCA) Not Currently Available : not used
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