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Centaurea nigra L.

Black 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
SpeciesnigraBlack, referring to the color of the seeds

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Centaurea nigra L. var. radiata DC.


Centaurea nigra description by Thomas H. Kent, last updated 25 May 2020.

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Centaurea nigra (black knapweed)

9/1/2018 · Bates Land and Blackman Land, Groton Conservation Trust, Groton, Mass­a­chu­setts
≈ 3½ × 3" (9.4 × 8.4 cm) ID is uncertain


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