Invasive Plant Details
Back to Full ListYellow Hawkweeds
Latin Name: Pilosella officinarum and Pilosella caespitosa
Identification
Flower: Bright yellow, dandelion-like flower heads that bloom from late spring through summer.
Leaves: Narrow, lance-shaped, and slightly hairy, forming basal rosettes.
Stems: Erect, slender, and hairy, growing up to 60 cm tall, often with a few scattered leaves along the stem.
Growing Environment: Prefers well-drained soils in meadows, fields, roadsides, and disturbed areas.
Growth Habit: A perennial herb that spreads through seeds and creeping stolons, forming dense mats or loose colonies. It often creates low-growing patches of yellow flowers in open, grassy habitats. In situ, yellow hawkweeds appear as scattered or dense clusters of bright yellow flowers in meadows or along roadsides.
Impacts on Environment
Impacts: Highly invasive in meadows and grasslands, where they form dense mats that displace native vegetation.