Thistle, Star; Centaurea solstitialis
Late bloomer. Yellow spiny flowers, highly invasive alien weed! Can kill animals, eradication difficult.
Notes: Aster (Sunflower) family. From Asia. Best controlled by pulling up plant before they go to seed, as one plant can eventually have 80,000 seeds.
Click on genus name below to go to USDA for this genus.
Kingdom Plantae -- Plants
Subkingdom Tracheobionta -- Vascular plants
Superdivision Spermatophyta -- Seed plants
Division Magnoliophyta -- Flowering plants
Class Magnoliopsida -- Dicotyledons
Subclass Asteridae
Order Asterales
Family Asteraceae -- Aster family
Genus Centaurea L. -- knapweed
Species Centaurea solstitialis L. -- yellow star-thistle
Thistle, Star; Centaurea
solstitialis |