Kalingag or Philippine Cinnamon (Cinnamomum Mercadoi) is a small tree, about 6 to 10 metres high, with a thick, aromatic bark. The plant part of the family Lauraceae, which contains about 45 genera and 2000-2500 species, and is related to the culinary cinnamon, sassafras, and bay tree. The plant is indigenous to the Philippines, where it grows best in forests at low and medium altitudes that sometimes ascend to 2,000 metres.

C. mercadoi is unusual in the cinnamon family in that its essential oil consists large amounts of safrol, whereas other oils of cinnamon contain cinnamaldehyde. It is currently listed in the International Union for Conservation of Nature Red List as “vulnerable” due to the overharvesting and the continuous loss of the Philippine forests.