Acer saccharinum
-Limonene is a major component of the aromatic scents and resins characteristic of numerous coniferous and broadleaved trees: red and silver maple ("Acer rubrum", "Acer saccharinum"), cottonwoods ("Populus angustifolia"), aspens ("Populus grandidentata", "Populus tremuloides") sumac ("Rhus glabra"), spruce ("Picea" spp.), various pines (e.g., "Pinus echinata", "Pinus ponderosa"), Douglas fir ("Pseudotsuga menziesii"), larches ("Larix" spp.), true firs ("Abies" spp.), hemlocks ("Tsuga" spp.), cannabis ("Cannabis sativa" spp.), cedars ("Cedrus" spp.), various Cupressaceae, and juniper bush ("Juniperus" spp.). It contributes to the characteristic odor of orange peel, orange juice and other citrus fruits. To optimize recovery of valued components from citrus peel waste, d-limonene is typically removed.