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Centaurea jacea L.

Brown knapweed

KingdomPlantaePlants, but not fungi, lichens, or algae
SubkingdomTracheobiontaVascular plants—plants with a “circulatory system” for delivering water and nutrients
DivisionMagnoliophytaFlowering plants, also known as angiosperms
ClassMagnoliopsidaDicotyledons—plants with two initial seed leaves
SubclassAsteridaeA large class that encompasses asters
OrderAsteralesFlowering plants with a central disk flower and surrounding petals, like daisies
FamilyAsteraceaeThe aster family, which also includes daisies and sunflowers; from the Greek ἀστήρ, “star,” for the star-shaped flowers
GenusCentaureaFrom the Latin and a reference to the Centaur Chiron who was supposed to have discovered the medicinal uses of a plant in Greece that came to be called Centaury
Speciesjacea

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Centaurea jacea (brown knapweed)

7/20/2023 · Curtis Farm Preserve, Harpswell, Maine

Centaurea jacea (brown knapweed)

7/31/2012 · Bemis Rd Conservation Area, Pepperell, Mass­a­chu­setts · ≈ 4½ × 3″ (11 × 7.9 cm) ID is uncertain

Centaurea jacea (brown knapweed)

7/17/2010 · Mackworth Island, Falmouth, Maine · ≈ 5 × 3½″ (13 × 9.2 cm)

Centaurea jacea (brown knapweed)

7/17/2010 · Mackworth Island, Falmouth, Maine · ≈ 11 × 7″ (27 × 18 cm)

Centaurea jacea (brown knapweed)

6/29/2014 · Mount Agamenticus, York, Maine · ≈ 9 × 6″ (23 × 16 cm)

Centaurea jacea (brown knapweed)

7/12/2015 · Rte. 108, Stowe, Ver­mont · ≈ 7 × 4½″ (16 × 11 cm) ID is uncertain

Centaurea jacea (brown knapweed)

7/20/2023 · Curtis Farm Preserve, Harpswell, Maine

Centaurea jacea (brown knapweed)

7/12/2015 · Rte. 108, Stowe, Ver­mont · ≈ 6 × 4″ (16 × 10 cm) ID is uncertain

Centaurea jacea (brown knapweed)

7/17/2010 · Mackworth Island, Falmouth, Maine · ≈ 5 × 3½″ (13 × 9.2 cm)

Centaurea jacea (brown knapweed)

7/17/2010 · Mackworth Island, Falmouth, Maine · ≈ 9 × 6″ (22 × 14 cm)

Centaurea jacea (brown knapweed)

7/12/2015 · Rte. 108, Stowe, Ver­mont · ≈ 7 × 4½″ (16 × 11 cm) ID is uncertain

 

Centaurea jacea description by Thomas H. Kent, last updated 26 Jul 2023.

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Centaurea jacea (brown knapweed)

6/29/2014 · Mount Agamenticus, York, Maine · ≈ 9 × 6″ (22 × 15 cm)

Centaurea jacea (brown knapweed)

7/20/2023 · Curtis Farm Preserve, Harpswell, Maine

Centaurea jacea (brown knapweed)

7/12/2015 · Rte. 108, Stowe, Ver­mont · ≈ 7 × 4½″ (16 × 11 cm) ID is uncertain

Centaurea jacea (brown knapweed)

7/17/2010 · Mackworth Island, Falmouth, Maine · ≈ 2½ × 3½″ (6.6 × 9.8 cm)

Centaurea jacea (brown knapweed)

7/20/2023 · Curtis Farm Preserve, Harpswell, Maine

Centaurea jacea (brown knapweed)

6/29/2014 · Mount Agamenticus, York, Maine · ≈ 7 × 4½″ (18 × 12 cm)

Centaurea jacea (brown knapweed)

7/17/2010 · Mackworth Island, Falmouth, Maine · ≈ 7 × 4½″ (17 × 11 cm)

Centaurea jacea (brown knapweed)

7/31/2012 · Bemis Rd Conservation Area, Pepperell, Mass­a­chu­setts · ≈ 5 × 3½″ (13 × 9.2 cm) ID is uncertain

Centaurea jacea (brown knapweed)

7/31/2012 · Bemis Rd Conservation Area, Pepperell, Mass­a­chu­setts · ≈ 3½ × 2½″ (9.8 × 6.6 cm) ID is uncertain

Centaurea jacea (brown knapweed)

7/12/2015 · Rte. 108, Stowe, Ver­mont · ≈ 7 × 4½″ (18 × 12 cm) ID is uncertain

Centaurea jacea (brown knapweed)

7/20/2023 · Curtis Farm Preserve, Harpswell, Maine

Range:

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