A perennial whose foliage dies in the winter, with re-growth from the roots in mid-spring. Reproduction is from seeds that have long, silky hairs attached that allow them to be spread by the wind. One of many species of tarweed in California in several genera, and most species have highly aromatic foliage. This particular species smells remarkably like mentholyptus. Plants are highly tolerant of dry, compacted soil, and are common along roadsides and in waste places.
Physical removal of dead plants may be needed where their roadside growth obstructs visibility. A systemic herbicide will effectively kill all plant parts, and a pre-emergent will effectively prevent seeds from germinating the following year.