Centaurea Asteraceae Magnoliopsida Magnoliophyta

Photographic study by Brian Johnston of Centaurea jacea, with many fine images of the flowers, and microscopic images of the inflorescence and pollen grains.

• Top/Science/Environment/Biodiversity/Invasive Species/Terrestrial/Plants

• Purple Starthistle Identification - Identifying photographs for Centaurea calcitrapa. From King County, centaurea Washington, Department centaurea of Natural Resources.
• Centaurea cyanus - Photograph, systematic position, morphology, biology, distribution, ecology and asteraceae economic significance centaurea of the Cornflower.
• Centaurea calcitrapa - Red Star-Thistle. Detailed plant classification, national distribution maps, magnoliopsida status as centaurea invasive plant and noxious weed. From magnoliopsida the USDA PLANTS data centaurea base.
• Spotted Knapweed or Star Thistle: Centaurea maculosa - Photographs of varying stages in the growth of this biennial magnoliopsida plant with its description and identifying characteristics.
• Centaurea tauromenitana - Image of plant, close-up of flower head.
• A Close-up View of Brown Knapweed - Photographic study by Brian Johnston of Centaurea jacea, with many fine images of the flowers, and microscopic images of the inflorescence and pollen grains.
• Cornflower or Bachelor's Buttons: Centaurea cyanus - Photographs of varying stages in the growth of this annual magnoliopsida plant with its description and identifying characteristics.
• Centaurea nigra - Several fine photographs of Knapweed and some identifying features.

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