Each of these beautiful cards contains actual seeds of four trees : Red Sandalwood / Adenanthera pavonina, Flamboyant / Delonix regia, Copper Pod / Peltophorum pterocorpum, Indian Laburnum / Cassia fistula. Lend an active hand in helping the planet and conserving its amazing variety by planting a tree. Set of 4 cards and envelopes.