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Juniperus oxycedrus

life science Maturity 9-11 Next article →

Juniperus oxycedrus is a highly variable species of juniper. It is commonly known by several names, including Cade, cade juniper, and prickly juniper. It may also be called prickly cedar or sharp cedar. This plant is native to the entire Mediterranean region. It thrives in many environments, including rocky sites at sea level. The name oxycedrus comes from its Greek roots. It translates to "sharp cedar." Some researchers believe this species may have been the original cedar used by ancient Greeks.

The physical appearance of this plant changes depending on its environment. It can grow as a spreading shrub or as a small erect tree. The leaves are needle-like and grow in whorls of three. These green leaves are long and broad. On the inner surface, they feature a double white stomatal band. This band is split by a green midrib. The plant is also dioecious. This means that male and female reproductive parts are on separate plants.

The reproductive process involves specific stages for the cones. The female plants produce seed cones that resemble berries. These cones begin as green structures. They take 18 months to fully ripen. Once ripe, they turn orange-red and may have a pink waxy coating. The cones are spherical and contain three or six fused scales. Each scale holds a single seed.

Seed dispersal is a biological process involving local wildlife. Birds eat the fleshy scales of the ripe cones. As the birds digest the fleshy parts, they pass the hard seeds through their droppings. This method allows the seeds to be spread to new locations. Meanwhile, the male plants produce yellow pollen cones. These cones are long and thin. They fall from the plant shortly after shedding pollen in late winter or early spring.

Scientists have found that this species is very complex due to its wide range. Many subspecies have been identified over time. However, studies using DNA fingerprinting and leaf essential oils show these subspecies are not closely related. This has led to the recognition of several distinct species. For example, Juniperus oxycedrus L. is the Western prickly juniper. It grows in Southwest Europe and Northwest Africa. It has long leaves and smooth cones.

Other distinct types exist across the Mediterranean. Juniperus navicularis, or the Portuguese prickly juniper, lives on the coastal southwest of Portugal. It has shorter leaves than the Western variety. The Eastern prickly juniper, Juniperus deltoides, grows from Central Italy to Iran and Israel. This type has broad-based leaves and cones with raised scale edges. There is also the large-fruited juniper, Juniperus macrocarpa. It grows in coastal sands and has wider leaves and larger cones. Finally, the variety J. oxycedrus var. badia has large, purple-tinged cones.

Humans have utilized this plant for various practical purposes. One major use is the production of Cade oil. This essential oil is obtained through destructive distillation of the wood. The resulting oil is dark and aromatic. It carries a very strong smoky smell. Historically, Cade oil has been used as incense. It is also used in some cosmetics and traditional skin treatment drugs. Its use is documented in texts like the 1911 British Pharmacopaea. However, users must be careful, as the oil has caused severe allergic reactions in infants on rare occasions.

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