Silphium (genus)
''Silphium'' is a genus of North American plants in the tribe Heliantheae within the family Asteraceae. Members of the genus, commonly known as rosinweeds, are herbaceous perennial plants growing to to more than tall, with yellow (rarely white) flowerheads that resemble sunflowers. In the rosinweeds, the outer florets in the head are fertile and the inner florets are sterile; in the sunflowers, the reverse is true. The name of the genus comes from the Ancient Greek word for a Silphium (antiquity), North African plant whose identity has been lost, though it is known its gum or juice was prized by the ancients as a medicine and a condiment. Species Species in the genus include:Flann, C (ed) 2009+ Global Compositae Checklist
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Silphium Integrifolium
''Silphium integrifolium'' is a species of flowering plant in the family Asteraceae. Its common names include rosinweed, whole-leaf rosinweed, entire-leaf rosinweed, prairie rosinweed,''Silphium integrifolium''
NatureServe. 2012. and silflower.Flesher, John, and Webber, Tammy,
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', AP News, Associated Press, November 3, 2021 It is native to eastern North America, including Ontario in Canada and the eastern and central United States as far west as New Mexico.
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