BugwoodWiki Article

purple starthistle
Centaurea calcitrapa L.

Overview

Appearance
Centaurea calcitrapa is a biennial to perennial plant. It grows 2-3 ft. (0.61-0.91 m) tall.
Foliage
The stems and leaves are covered with fine hairs. Lower and basal leaves are divided or deeply lobed. Leaves become less divided toward the apex of the plant.
Flowers
Flowering occurs from July to October, when purple to pink blooms develop at the ends of the stems. Floral bracts are tipped with 1 in. (2.5 cm) long, straw colored spines.
Fruit
The fruit is an achene 0.08-0.16 in. (2-4 mm) long which lacks a pappus.
Ecological Threat
A native of southern Europe, Centaurea calcitrapa produces prolific seeds and often invades floodplains, dry forests and grasslands.

Image Sets
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Maps


EDDMapS Distribution - This map is incomplete and is based only on current site and county level reports made by experts, herbaria, and literature. For more information, visit www.eddmaps.org

EDDMapS Distribution

State Invasive List - This map identifies those states that list this species on their invasive species list. For more information, visit Invasive.org

State Invasives List

Taxonomic Rank

Kingdom: Plantae
Phylum: Magnoliophyta
Class: Magnoliopsida
Subclass: Asteridae
Order: Asterales
Family: Asteraceae
Genus: Centaurea

Other System Links

Plants: CECA2
Bayer: CENCA
GRIN: 316612
ITIS: 36952
NPDN Pest: PBFARBA

Synonyms and Other Names

Other Common Names:
red starthistle

Categories

Category: Forbs/Herbs