REPORT

Invasive Plant Details

Back to Full List

Yellow Hawkweeds

Latin Name: Pilosella officinarum and Pilosella caespitosa

Priority Ranking: Low Priority

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.

Priority Ranking: Low Priority

Impacts on Environment

Impacts: Highly invasive in meadows and grasslands, where they form dense mats that displace native vegetation.