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A mature specimen of this native perennial plant ranges from 6-12' tall. They resemble wild sunflowers in overall size, shape, and structure. A large central taproot can extend 15 ft. into the ground. A resinous substance is produced by the upper stem when the plant is blooming. This plant can live up to 100 years.   localphoto   Link   Link     Link     Distribution   photo     photo   Genus: Silphium (rosinweed) Family: Asteraceae (compositae ( aster, daisy, or sunflower family)) Order: Asterales (asterales) Class: Magnoliopsida (Dicots) Phylum/Division: Magnoliophyta (Flowering plants) Kingdom: Plantae (Plants) |