Centaurea nigra (black knapweed)

Centaurea nigra L.

Centaurea nigra L. var. radiata DC.

Black knapweed

Kingdom	Plantae	Plants, but not fungi, lichens, or algae
Subkingdom	Tracheobionta	Vascular plants—plants with a “circulatory system” for delivering water and nutrients
Division	Magnoliophyta	Flowering plants, also known as angiosperms
Class	Magnoliopsida	Dicotyledons—plants with two initial seed leaves
Subclass	Asteridae	A large class that encompasses asters
Order	Asterales	Flowering plants with a central disk flower and surrounding petals, like daisies
Family	Asteraceae	The aster family, which also includes daisies and sunflowers; from the Greek ἀστήρ, “star,” for the star-shaped flowers
Genus	Centaurea	From 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
Species	nigra	Black, referring to the color of the seeds

[An article has not been written yet.]

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

7/17/2010 · Mackworth Island, Falmouth, ME
≈ 5 × 3½" (13 × 9.2 cm) ID is uncertain

7/17/2010 · Mackworth Island, Falmouth, ME
≈ 7 × 7" (16 × 18 cm) ID is uncertain

7/17/2010 · Mackworth Island, Falmouth, ME
≈ 2½ × 2½" (7.3 × 6.8 cm) ID is uncertain

7/17/2010 · Mackworth Island, Falmouth, ME
≈ 7 × 4½" (17 × 11 cm) ID is uncertain

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

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