Alectoria sarmentosa is a long-lived, perennial lichen. It is also sometimes classified as a fungus. It is a light greenish colored and fruticose or bushy bodied. This epiphytic lichen belonging to the Alectoriaceae family and the suborder Lecanorineae, which includes six similar species. A. sarmentosa grows draped or strung over conifer tree limbs and deciduous shrub branches in Northern temperate rainforest. This lichen favors mature and old growth, wet conifer and hardwood forests with clean air. A. sarmentosa is sensitive to air pollution and used for air quality monitoring. Areas required by A. sarmentosa are found in northern and southern temperate zones and receive high rainfall. This lichen is commonly found in transitional areas between valley and mountainous forests, but usually