Mild sweeteners such as fireweed (Epilobium angustifolium), camas bulb (Camassia quamash) or sweet berries such as salal berries (Gaultheria shallon), or thimbleberries (Rubus parviflorus) are occasionally added.
Another double-flowered thimbleberry was found about 1975 by Bob Hornback on Starrett Hill, Monte Rio, California and given the cultivar name 'Dr.