Basal-leaved Rosinweed - Silphium terebinthinaceum
Above: Basal-leaved Rosinweed in the UW-Madison Arboretum in Madison, Wisconsin (8/18/20).
Basal-leaved Rosinweed - Silphium terebinthinaceum
Basal-leaved Rosinweed is a native perennial that grows grows from 3' to 10' tall with stems that are mostly leafless and smooth.
The yellow flowers appear from July through September.
The Basal-leaved Rosinweed is related to Rosinweed (Silphium integrifolium), Cup Plant (Silphium perfoliatum)) and the Compass Plant (Silphium laciniatum).
Other Names: Prairie rosinweed and Prairie-dock
Silphium: old Greek generic name referring to resinous juice.
Above: Basal-leaved Rosinweed stem and leaves.
For more information on the Basal-leaved Rosinweed, visit Wikipedia.
Or, visit the UW-Madison Wisconsin State Herbarium website page about Basal-leaved Rosinweed.
Basal-leaved Rosinweed
Silphium terebinthinaceum
Above: Basal-leaved Rosinweed in the UW-Madison Arboretum in Madison, Wisconsin on August 18, 2020.
Above: Basal-leaved Rosinweed in the UW-Madison Arboretum in Madison, Wisconsin on July 24, 2022.
Above: 1913 Basal-leaved Rosinweed illustration.
Above: Silphium Terebinthinaceum line drawing from USDA NRCS, Wetland flora Field office illustrated guide.
Above: Basal-leaved Rosinweed specimen collected in Grant County on October 5, 2014.
