Heterotheca

[n] - genus of yellow-flowered North American herbs
Found on http://www.webdictionary.co.uk/definition.php?query=Heterotheca

Heterotheca

Heterotheca, (golden asters or false goldenasters) are members of the plant family Asteraceae. These are annual and perennial herbs bearing daisylike flower heads with yellow disc florets and usually yellow ray florets. Several species now included in Heterotheca were previously classified in the genus Chrysopsis Heterotheca species are often used...
Found on http://en.wikipedia.org/wiki/Heterotheca
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