Bighead Knapweed Flower Mound
Centaurea macrocephala is a member of the thistle tribe cynareae in the sunflower family.
Bighead knapweed flower mound. This perennial species is the tallest knapweed growing in the pacific northwest ranging from two to five feet tall depending on the habitat. The plant stems are upright and unbranched terminating in a single flower head. The plant grows on sturdy root stock and can reach five feet tall.
Safflower carthamus tinctorius grown for seed oil has a very similar flower. It has been a cultivated ornamental for over 200 years. Big head knapweed is a perennial herb that can range in height from 2 to 5 feet.
This plant spreads by seed and it has the capability to establish in natural areas particularly in subalpine meadows. Bighead knapweed is a long lived perennial herb native to the caucasus region of eastern europe. Big head knapweed is a member of the asteraceae or sunflower family.
Giant knapweed bighead knapweed yellow hardhead armenian basketflower centaurea macrocephala flowering in summer c5j9je from alamy s library of millions of high resolution stock photos illustrations and vectors. The leaves are large broad rough hairy and lance shaped with pointed tips alternating on the stem. Are ornamental flowers with cup shaped petals rather than hair like petals on the bighead knapweed.
The plant stems are upright and unbranched terminating in a single flower head. Introduced to the uk and north america in the early 1800s it is still widely available in the horticultural trade as seed plants and cut dried flowers. Bighead knapweed is a large perennial herb with yellow globe shaped flower heads that are about 1 3 inches in diameter and grow singly on tops of stems.
The leaves grow pointing upwards and blades of the leaves extend down along the stem creating characteristic vertical wings on the stem. Bighead knapweed has conspicuously large yellow flowers that are 3 8 cm wide. Download this stock image.
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