Barnaby's — Thistle

(scientific name Centaurea solstitialis ), more commonly known as Yellow Starthistle , is a highly invasive winter annual or biennial herb native to the Mediterranean region and Eurasia. It is widely recognized for its bright yellow flower heads protected by sharp, straw-colored spines that can reach up to two inches in length. Key Identification Features

: A single plant can produce up to 100,000 seeds , which are easily dispersed by wind, water, or clinging to animal fur and machinery. Ecological and Agricultural Impact barnaby's thistle

: Blooming occurs from June through October. The flower heads are topped with yellow florets and surrounded by stiff, sharp spines arranged in a star-like pattern. (scientific name Centaurea solstitialis )