Expressed in trichomes. Detected in flowers, but not in leaves. The Asp-Asp-Xaa-Xaa-Asp/Glu (DDXXD/E) motif is important for the catalytic activity, presumably through binding to Mg(2+). Belongs to the terpene synthase family. Tpsb subfamily. No monoterpene, sesquiterpene or diterpene synthase activity detected in the heterologous expression system tested.