Carduus × Personatoformis Subsp. Subinteger

Bull thistle, scientifically known as Carduus × personatoformis subsp. subinteger, is a noxious weed commonly found in disturbed soils across North America. This plant is characterized by its spiny leaves and large, purple flower heads that resemble thistles. It thrives in sunny, open areas and can quickly dominate native vegetation if left unchecked. Bull thistle spreads through both seeds and vegetative growth, making it a challenging weed to control. Its presence often indicates poor soil health or human disturbance in the landscape.