Taken 11-Jun-12
Visitors 8


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Dimensions3005 x 4500
Original file size38.7 MB
Image typeTIFF
Color spaceAdobe RGB (1998)
Date taken11-Jun-12 09:01
Date modified4-Jan-16 15:21
Shooting Conditions

Camera makeCanon
Camera modelCanon EOS 5D Mark III
Focal length65 mm
Max lens aperturef/2.8
Exposure2s at f/16
FlashNot fired, compulsory mode
Exposure bias0 EV
Exposure modeManual
Exposure prog.Manual
ISO speedISO 100
Metering modePattern
Thistle bloom bud.

Thistle bloom bud.

Cirsium is a genus of perennial and biennial flowering plants in the Asteraceae, one of several genera known commonly as thistles. They are more accurately known as Plume thistles. These differ from other thistle genera (Carduus, Silybum and Onopordum) in having feathered hairs to their achenes. The other genera have a pappus of simple unbranched hair.[2]
They are mostly native to Eurasia and northern Africa, with about 60[1] species from North America (although several species have been introduced outside their native ranges).
Thistles are known for their effusive flower heads, usually purple or rose to pink, also yellow or white. The radially symmetrical disk flowers are at the end of the branches. They have erect stems and prickly leaves, with a characteristic enlarged base of the flower which is commonly spiny. The leaves are alternate, and some species can be slightly hairy. Extensions from the leaf base down the stem, called wings, can be lacking (Cirsium arvense), conspicuous (Cirsium vulgare), or inconspicuous. They can spread by seed, and also by rhizomes below the surface (Cirsium arvense). The seed has tufts of tiny hair, or pappus, which can carry them far by wind.