Grindelia essential oil is a unique to say the least. Some seasons this common roadside "weed" is very abundant, others not. Summer 2023 there was a nice stand to work with & a few ounces were poured off the separator.
Traditionally this plant has been used to treat asthma and respiratory conditions. The essential oil can be used diluted in a carrier oil such as Jojoba or diffused via vaporizer.