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History
Silphium (genus)
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Silphium is a genus of North American plants in the tribe Heliantheae within the family Asteraceae.
Silphium (genus)
Silphium (genus)
Silphium integrifolium (rosinweed) flowers
Silphium integrifolium (rosinweed) flowers
Silphium laciniatum (compass plant) leaves
Silphium laciniatum (compass plant) leaves
Silphium perfoliatum (cup plant) flowers in Lower Saxony, Germany
Silphium perfoliatum (cup plant) flowers in Lower Saxony, Germany
Heliantheae
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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. A few genera are pantropical.
Heliantheae
Heliantheae
Bidens biternata- Spanish needles
Bidens biternata- Spanish needles