Onopordum acanthium

Onopordum acanthium

Asteraceae Form -native to Europe and Asia, can grow up to 7 feet in height and 6 feet wide -very invasive speices for ranchers out west, acts as barrier to prevent movement of livestock Culture -grows in rich soil of cultivated gardens to poor soil in waste areas -full sun -drought resistant -seeds easily dispersed by wind causing a weed problem Foliage -large leaves covered with a cotton-like layer of hairs on top and bottom -edges of leaves have sharp yellow spines -branch tips give rise to 2 or 3 globe-shaped flower heads