The Heliantheae are the third-largest tribe in the sunflower family (Asteraceae). With some 190 genera and nearly 2500 recognized species, only the tribes Senecioneae and Astereae are larger. The name is derived from the genus Helianthus, which is Greek for sun flower. Most genera and species are found in North America and South America, particula...
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http://en.wikipedia.org/wiki/Heliantheae
(from the article `Asterales`) In many members of the order, especially the archaic tribe Heliantheae, the common receptacle (the short stem tip, on which all the flowers of the ...
Found on
http://www.britannica.com/eb/a-z/h/33
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