Bighead Knapweed Flower Images

Rea solstitialis has smaller flowers but has spines on its head.

Bighead knapweed flower images. Foliage broadly lance shaped leaves with sharp pointed tips are rough to the touch and up to 15 in. 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. Big headed knapweed this plant can be weedy or invasive according to the authoritative sources noted below this plant may be known by one or more common names in different places and some are listed above.

38 1 cm long at the base of the plant. Flowers are pollinated by a wide range of insects including bees flies butterflies and beetles and the seed heads attract goldfinches and other seed feeding birds. 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.

Find the perfect bighead knapweed stock photo. 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 is known throughout much of the world as an introduced species. No need to register buy now. Various common names including lemon fluff globe centaury and pineapple thistle.

Low bracts contain spines. Big head knapweed is native to armenia turkey and the caucasus mountains. Bighead knapweed centaurea melitensis maltese star thistle centaurea moncktonii jacea nigra meadow knapweed centaurea montana.

Seeds are medium brown ridged 1 4 inch in length and contain a ring of light colored bristles. Diffuse knapweed distribution 2011 spotted knapweed distribution 2011. Click on a scientific name below to expand it in the plants classification report.