1) Asterid dicot genus 2) Genus silphium 3) Medicinal plant 
[genus] Silphium is a genus of about 20 species of flowering plants in the family Asteraceae, native to eastern North America. Members of the genus, commonly known as rosinweeds, are herbaceous perennial plants growing to 0.5–4 m tall, with yellow (rarely white) flowerheads. The name of the genus comes from the Ancient Greek word for a No...
genus of tall perennial plants in the family Asteraceae, consisting of about 23 yellow-flowered species commonly called rosinweed, native to North ...
[n] - tall North American perennial herbs
genus Silphium noun tall North American perennial herbs