Monoterpene synthase catalyzing the production of beta-phellandrene from neryl diphosphate. Produces also lower amounts of delta-2-carene, alpha-phellandrene and limonene. When incubated in vitro with geranyl diphosphate, catalyzes the formation of acyclic myrcene and ocimene as major products in addition to beta-phellandrene. neryl diphosphate = beta-phellandrene + diphosphate Trichomes. 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. Tpse subfamily.