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Thistle flower


Thistle flower
Photo Information
Copyright: Isaac Oster (isaacoster) Silver Note Writer [C: 5 W: 0 N: 15] (361)
Genre: Plants
Medium: Color
Date Taken: 2010-05-02
Categories: Flowers
Camera: Canon Rebel T1i, 100mm f/2.8MacroĜ58
Exposure: f/7.1, 1/250 seconds
More Photo Info: [view]
Photo Version: Original Version
Date Submitted: 2010-05-10 6:51
Viewed: 3469
Points: 0
[Note Guidelines] Photographer's Note
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.


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