E-Flora BC: Electronic Atlas of the Flora of British Columbia

Centaurea melitensis L.
Maltese star-thistle
Asteraceae (Aster family)

Introduction to Vascular Plants

© Jamie Fenneman  Email the photographer   (Photo ID #9829)

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Distribution of Centaurea melitensis
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Species Information

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General:
Annual herb from a taproot; stems erect, winged, ridged, branched, 15-70 cm tall.
Leaves:
Basal leaves oblanceolate, toothed to lobed, hairy; stem leaves becoming lanceolate to linear-oblong, entire and reduced.
Flowers:
Heads discoid, few to numerous, solitary or 2-5 at the ends of branches; involucres 8-15 mm tall, nearly as wide; involucral bracts glabrous, the outer ones leathery, with a 5-9 mm terminal spine bearing 2-3 pairs of short, lateral spines; disk flowers bright yellow, all tubular and perfect, 8-11 mm long.
Fruits:
Achenes grey, with regular narrow, longitudinal stripes, 1-3 mm long; pappus white, 2.5-3 mm long.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Mesic disturbed areas in the lowland zone; rare in SW BC, known recently only from Samuel and Georgeson Islands in the Gulf Islands; introduced from the Mediterranean region.

Source: The Illustrated Flora of British Columbia

Climate

The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Taxonomic and Nomenclatural Links

Additional Photo Sources

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General References