Centaurea triumfettii

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Squarrose knapweed

Taxonomy

  • Kingdom: Plantae
  • Clade: Tracheophytes
  • Clade: Angiosperms
  • Clade: Eudicots
  • Clade: Asterids
  • Order: Asterales
  • Family: Asteraceae
  • Genus: Centaurea
  • Species: Centaurea triumfettii

Common Names by Region

  • Europe (English-speaking regions): Squarrose Knapweed
  • Germany: Berg-Flockenblume
  • France: Centaurée de Triumfetti
  • Italy: Fiordaliso di Triumfetti

Description

  • Growth Habit: Herbaceous perennial
  • Size: Typically grows to 30–60 cm (12–24 inches) tall
  • Leaves: Basal leaves are lanceolate to ovate, sometimes with slight lobing; upper leaves more linear and sessile
  • Flowers: Violet to deep blue flower heads, thistle-like, composed of numerous tubular florets; bracts have a distinctive squarrose (outward-curving) appearance, giving the species its common name

Known Range

  • Native Range: Central and Southern Europe, especially alpine and subalpine meadows and slopes
  • Cultivated Range: Occasionally found in ornamental gardens throughout Europe and North America; considered naturalized in parts of the U.S.

Care Requirements

  • Light: Full sun to partial shade
  • Watering: Moderate; drought-tolerant once established
  • Soil: Prefers well-drained, slightly alkaline soils; tolerant of rocky and poor soils
  • Humidity: Prefers drier climates; avoid excessive humidity
  • Temperature: Hardy to USDA zones 3–8
  • Propagation: Best propagated by seed in spring or by division in autumn
  • Common Pests/Diseases: Generally pest-resistant; may occasionally suffer from powdery mildew in humid conditions

Additional Notes

  • Special Features: Attracts bees and butterflies; excellent for pollinator gardens and xeriscaping
  • Maintenance Level: Low; deadhead to encourage prolonged blooming and prevent unwanted self-seeding in garden settings
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