The management board of the Pu Luong Nature Reserve in Bac Thuoc district, the north-central province Thanh Hoa, has launched a project to preserve three precious and rare plant species – Trai ly (Garcinia fagraeoides A. Chev.), Dinh tung (Cephalotaxus mannii Hook. f.), and Tra hoa trai mong (Camellia pleurocarpa) in the area.