Bighead Knapweed Flower Valley
The plant grows on sturdy root stock and can reach five feet tall.
Bighead knapweed flower valley. Bighead knapweed is a long lived perennial that grows up to 1 7 m tall. The leaves grow pointing upwards and blades of the leaves extend down along the stem creating characteristic vertical wings on the stem. Big head knapweed is a perennial herb that can range in height from 2 to 5 feet.
The flowers of spotted knapweed have been mistaken for wild bergamot monarda fistulosa which it vaguely resembles but the leaves and overall plant structure are very different between the two species. The leaves are large broad rough hairy and lance shaped with pointed tips alternating on the stem. It is one of the many perennial knapweed species found in the pacific northwest region.
Bcinvasives ca info bcinvasives ca 1888 9 3337 22. The heads are 2 5 to 3 5 cm wide. The flower heads are solitary atop the stems and have arrays of small leaves around the bases.
Basal rosette leaves are stalked 15 inches in length and 2 inches wide. Description big head knapweed is a member of the asteraceae or sunflower family. Those near the base have oval blades borne on petioles and those higher on the plant have shorter narrower blades.
The leaves are variable in shape and size. Flowers are bright yellow and encased in light green or tan bracts flowering from july thorugh september. It has been a cultivated ornamental for over 200 years.
The stems and leaves are both covered in short soft hairs. Bighead knapweed is a long lived perennial herb native to the caucasus region of eastern europe. The stems and bracts are stiff and scratchy making walking through a patch of this an uncomfortable experience.
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