Appearance
It flowers between June and October and its flowers have a diameter of 3–5 cm. The root and buds are edible, and it has a milky latex. It grows 30 to 100 cm tall.It differs from viper's-grass in that Viper's-grass has short, pale green bracts, whereas in Goat's-beard they are long and pointed.
The lower leaves are 10 to 30 cm long, lanceolate, keeled lengthwise, grey-green, pointed, hairless, with a white midrib. The upper leaves are shorter and more erect. It is the only United Kingdom dandelion type flower with grass like leaves.
The flower heads are 5 cm wide. They only open in the morning sunshine, hence the name 'Jack go to bed at noon'.
The achenes are rough, long beaked pappus radiating outwards interwoven like a spider's web of fine white side hairs.
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