Page author: Don Knoke
Centaurea macrocephala
globe knapweed
WTU specimens
Other herbaria

Distribution: Sparingly introduced in Washington

Habitat: Occasionally escapes from cultivation

Flowers: June - September

Origin: Introduced

Conservation Status: Not of concern

Description:
General:

Perennial herbs, the several stems 50-170 cm. tall, erect, sparingly branched, thinly woolly.

Leaves:

Leaves alternate, the basal and lower cauline petiolate, becoming sessile upward; leaf blades dotted with glands, oblanceolate to narrowly ovate, 10-30 cm. long, entire or shallowly dentate.

Flowers:

Heads borne singly, sessile, closely subtended by clusters of reduced leaves; involucres ovoid to hemispheric, 25-35 mm. long, the involucral bracts glabrous, ovate to broadly lanceolate, pale green, with abruptly spreading appendages, brown, scarious, 1-2 cm. wide; flowers many, yellow, the outer sterile corollas slightly longer than the central, fertile corollas; pappus of flattened bristles 5-8 mm. long.

Fruits:

Achenes 7-8 mm. long.

Accepted Name:
Centaurea macrocephala Puschkarew ex Willd.
Publication: Sp. Pl. 3: 2298. 1803. 1803.

Synonyms & Misapplications:
(none provided)
Additional Resources:

PNW Herbaria: Specimen records of Centaurea macrocephala in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Centaurea macrocephala checklist entry.

E-Flora BC: Centaurea macrocephala atlas page.

CalPhotos: Centaurea macrocephala photos.

USDA Plants: Centaurea macrocephala information.

5 photographs:
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