rosinweed

rosinweed [roz-in-weed] Word Origin noun

1. any coarse, North American, composite plant of the genus Silphium, having a resinous juice and stalkless, paired leaves.
2. the compass plant, S. laciniatum.

Origin of rosinweed An Americanism dating back to 1825–35; rosin + weed1 British Dictionary definitions for rosinweed rosinweed noun

1. any of several North American plants of the genus Silphium and related genera, esp the compass plant, having resinous juice, sticky foliage, and a strong smell: family Asteraceae (composites)