Dandelion

n. plant with yellow flowers and toothed leaves

The name Dandelion is given to species of the genus (Taraxacum), a large genus of flowering plants in the family Asteraceae. In the Asteraceae (formerly Compositae) the 'flowers' are morphologically a composite flower head consisting of many tiny flowers called florets. The dandelion is native to Europe and Asia, and has spread to many other places. In northern areas and places where the dandelion is not native, it has become a weedy species, exploiting disturbed ground in human environments. Taraxacum species reproduce asexually by means of apomixis and seed production commonly occurs without pollination.
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Dandelion /dan·de·li·on/ a weedy herb, Taraxacum officinale, having deeply notched leaves and brilliant yellow flowers; used for dyspepsia, loss of [more]Dandelion - Community and Resources

Noun
1. any of several herbs of the genus Taraxacum having long tap roots and deeply notched leaves and bright yellow flowers followed by fluffy seed balls
(synonym) blowball
(hypernym) herb, herbaceous plant
(hyponym) common dandelion, Taraxacum ruderalia, Taraxacum officinale
(member-holonym) Taraxacum, genus Taraxacum

(n.)
A well-known plant of the genus Taraxacum (T. officinale, formerly called T. Dens-leonis and Leontodos Taraxacum) bearing large, yellow, compound flowers, and deeply notched leaves.