Thistle — Barnaby's

: 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 is considered a in many regions, including much of the western United States and Australia, due to its aggressive growth. 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

: It begins as a basal rosette with deeply lobed leaves. As it matures, the upper leaves become smaller and linear, forming "wings" that run down the stem. It is widely recognized for its bright yellow

: The plant typically grows between 1 and 3 feet tall, featuring gray-green to blue-green stems covered in fine, white cottony hairs.

: 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.