Taken 13-Apr-09
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Photo Info

Dimensions4500 x 3000
Original file size38.7 MB
Image typeTIFF
Color spaceAdobe RGB (1998)
Date taken13-Apr-09 17:40
Date modified4-Jan-16 15:25
Shooting Conditions

Camera makeCanon
Camera modelCanon EOS 5D Mark II
Focal length65 mm
Max lens aperturef/2.8
Exposure1/800 at f/3.5
FlashNot fired, compulsory mode
Exposure bias0 EV
Exposure modeManual
Exposure prog.Manual
ISO speedISO 1000
Metering modePattern
Thistle Bloom

Thistle Bloom

Thistle is the common name of a group of flowering plants characterised by leaves with sharp prickles on the margins, mostly in the family Asteraceae. Prickles often occur all over the plant - on surfaces such as those of the stem and flat parts of leaves. These are an adaptation that protects the plant against herbivorous animals, discouraging them from feeding on the plant. Typically, an involucre with a clasping shape of a cup or urn subtends each of a thistle's flowerheads.
The term thistle is sometimes taken to mean exactly those plants in the tribe Cynareae (synonym: Cardueae),[1] especially the genera Carduus, Cirsium, and Onopordum.[2] However, plants outside this tribe are sometimes called thistles, and if this is done thistles would form a polyphyletic group.