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Houndstongue (Cynoglossum officinale)       

The barbed seeds of Houndstongue.
The barbed seeds of Houndstongue.

Cynoglossum officinale (houndstongue, dog's tongue, gypsy flower, and rats and mice due to its smell) is a herbaceous plant of the family Boraginaceae, found in most parts of Europe, and also North America where it was accidentally introduced. It can be either annual or biennial, with reddish-purple flowers blooming between May and September. It lives in wet places, waste land and hedges. (From Wikipedia)

It is toxic to livestock and the seeds disperse easily with their hooked barbs. It got its name from the leaves which are hairy and rough and feel like a dog's tongue.
Houndstongue rosette.
Houndstongue rosette.

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