Centaurea scabiosa

Linnaeus

Sp. Pl. 2: 913. 1753

Common names: Greater knapweed hardheads centaurée scabieuse
Introduced
Treatment appears in FNA Volume 19. Treatment on page 185. Mentioned on page 183.

Perennials, 30–150 cm. Stems 1–several, branches ascending, glabrous to ± hirsute. Leaves minutely hispid, resin-gland-dotted; basal and proximal cauline petiolate, blades 10–25 cm, margins usually 1–2-pinnately divided into linear or oblong segments; mid and distal cauline smaller, entire or once dissected. Heads borne singly or few in open cymiform arrays, pedunculate. Involucres ovoid to hemispheric, becoming campanulate, 15–25 mm. Phyllaries: bodies dark green, ovate (outer) to oblong-lanceolate (inner), glabrous or finely arachnoid, margins and erect appendages black, ± fringed distally with slender teeth, inner phyllaries with brownish scarious, expanded, erose dissected appendages. Florets many; corollas reddish purple (white), those of sterile florets 35–40 mm, often conspicuously enlarged, those of fertile florets 20–25 mm. Cypselae brown, 4.5–5 mm, puberulent; pappi of many unequal stiff bristles, white, 4–5 mm. 2n = 20 (Russia), 40.


Phenology: Flowering summer (Jun–Sep).
Habitat: Disturbed sites, pastures, sparingly escaped from cultivation, probably not persisting in all areas where reported
Elevation: 50–1800 m

Distribution

V19-210-distribution-map.gif

Introduced; B.C., N.B., Ont., Que., Conn., Idaho, Iowa, Ky., Maine, Mont., N.H., N.J., N.Y., N.Dak., Ohio, Pa., Utah, Wyo., Europe.

Discussion

Selected References

None.

Lower Taxa

None.

... more about "Centaurea scabiosa"
David J. Keil +  and Jörg Ochsmann +
Linnaeus +
Asteraceae tribe Cynareae +
Greater knapweed +, hardheads +  and centaurée scabieuse +
B.C. +, N.B. +, Ont. +, Que. +, Conn. +, Idaho +, Iowa +, Ky. +, Maine +, Mont. +, N.H. +, N.J. +, N.Y. +, N.Dak. +, Ohio +, Pa. +, Utah +, Wyo. +  and Europe. +
50–1800 m +
Disturbed sites, pastures, sparingly escaped from cultivation, probably not persisting in all areas where reported +
Flowering summer (Jun–Sep). +
Introduced +
Acosta +, Cnicus +, Grossheimia +, Jacea +  and Leucacantha +
Centaurea scabiosa +
Centaurea +
species +