These seeds were collected from Grindelia squarrosa, also known as Curly-Cup Gumweed, curly-top Gumweed, and Rosin Weed. This perennial likes to live in full sun where it can grow to about 3 feet tall. The bright yellow blossoms are on display during the middle of the summer. The bees love this brilliant yellow flower which is very beneficial for the bees. This plant is a potential source for making future biofuels. Fresh or dried leaves can be used to make a tea, and the sap from this plant is used to make a type of chewing gum. The pods and flowering heads are very fragrant and can also be used to make yellow and green dyes. USDA Hardiness Zones 3 to 7.