Amomyrtus luma, commonly known as luma or palo colorado, is a species of evergreen tree belonging to the Myrtaceae family. It is native to the temperate rainforest regions of southern Chile and southwestern Argentina, particularly within the Valdivian temperate forests.
Taxonomy and Etymology
The species was originally described under the genus Myrtus. It was later reclassified into the genus Amomyrtus. The specific epithet luma is derived from the Mapudungun name for the tree. It is closely related to Amomyrtus meli, another species endemic to the same region.
Physical Characteristics
Amomyrtus luma is characterized by its slow growth and can reach heights of up to 20 meters, though it often grows as a large shrub in certain conditions. One of its most distinctive features is its smooth, reddish-brown to orange bark, which often peels in thin papery flakes.
The leaves are opposite, coriaceous (leathery), lanceolate to ovate in shape, and typically measure 2 to 5 centimeters in length. They are dark green and emit an aromatic scent when crushed. The tree produces small, white, hermaphroditic flowers with four petals and numerous prominent stamens, which are characteristic of the Myrtaceae family. The fruit is a globose berry, approximately 1 centimeter in diameter, turning dark purple or black when fully mature.
Distribution and Habitat
The species is primarily found in the moist, temperate climates of the Southern Cone of South America. It thrives in humid soils and is frequently found in coastal ranges and the foothills of the Andes. It is a common component of the secondary growth in native forests and is often found alongside species such as Nothofagus.
Uses
The wood of Amomyrtus luma is exceptionally dense, hard, and heavy. Due to its durability and resistance to impact, it has historically been used for the manufacture of tool handles, wheels, and structural components. In contemporary times, it is also utilized for high-quality firewood and charcoal.
The berries are edible and have been consumed traditionally by the Mapuche people. In horticulture, the species is cultivated as an ornamental plant in temperate regions globally, valued for its attractive bark and evergreen foliage. While it is related to the more widely known Luma apiculata (Chilean Myrtle), it is distinguished by its specific floral and leaf morphology.