Taraxacum officinale - Common Dandelion

Phylum: Magnoliophyta - Class: Equisetopsida - Order: Asterales - Family: Asteraceae

A field of Dandelions


Dandelions produce numerous very small yellow florets gathered together in a composite flower head upon a hollow stem or scape that releases a milky latex when cut or broken. The lobed leaves, up to 25 cm long, form a basal rosette above a long tapering taproot. A plant may support one or several flowering stems. Flower heads, deach typically 2 to 5cm across, open during the day and close up at night.


The Common Dandelion Taraxacum officinale is common and widespread throughout the UK, Ireland and much of Europe; it is the type species of the large and difficult to disentangle Taraxacum genus.

Flowering times

In April, Dandelions dominate much of the the landscape in Britain and Ireland, but a few specimens can usually be found in flower in every month of the year.


The genus name Taraxacum is thought to come from the Arabic word for a bitter herb. Plants were given the specific epithet officinale when they had a 'official' use in medicine/pharmacoligy. The common name Dandelion refers to the shape of the flower rays, like a lion's teeth: 'dents de lion' in French.


There are many myths and mysteries about dandelions, including the belief that picking them will cause incontinence. The leaves are sometimes used as a salad vegetable and the flowers are used in making dandelion wine.

There are a great many sub-species of dandelions, and many other plants are mistakenly given this name. From a distance, people sometimes mistake the many species of hawkbits for dandelions. True dandelions have hollow stems and, when picked, bleed a milky liquid.

Dandelion flowers

Above: The familiar bright yellow flower and dark green jagged leaves of the Common Dandelion.

Dandelion seedhead

Dandelion 'clocks' comprise the many seeds of this composite flower, with their downy parachutes that travel great distances on even the lightest of summer breezes. The seeds are particularly attractive to Goldfinches.

Goldfinch feeding on Dandelion seeds

Children still play the game of blowing at the seed heads, and they claim to determine the hour of the day by the number of blows required to disperse the seeds.

Dandelion seedhead, closeuo

The flowers shown on this page were photographed in West Wales between April and June.

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