Anadolu Sığla Ağacı (Oriental Sweetgum)

The Tree That Bleeds Perfume

Anadolu sığla ağacı (Liquidambar orientalis) is a relict tree species considered to be a survivor of warmer prehistoric climates that existed before the last Ice Age. The genus Liquidambar has existed for tens of millions of years, and the Anatolian species is a surviving member of a much older group of trees. In Turkish, it is also called günlük ağacı (the incense tree). In English, it is known as the oriental sweetgum.

The tree's scientific name tells its own story. Liquidambar combines the Latin word liquidus (liquid) with the Arabic word amber (a general term for fragrant substances). Orientalis means "of the East." Together, the name means something like "fragrant liquid from the East," a direct reference to the aromatic resin that has defined this tree's relationship with human civilization for millennia. The Turkish word sığla itself is borrowed from Greek (Rumca), reflecting the long coexistence of Turkish and Greek-speaking communities in the coastal regions where the tree grows.

What the Tree Looks Like

The sığla ağacı is a tall, deciduous tree that can reach 30 to 35 metres in height and live for up to 300 years. At first glance, it resembles a plane tree (çınar): wide-crowned, thick-branched, with bark that peels in patches. Its leaves are similar in shape to çınar leaves but slightly smaller and lighter in colour. It grows in wet lowland areas, along riverbanks, in flood plains, and in places where the water table sits close to the surface. It needs warmth, moisture, and light, and it thrives under subtropical conditions.

Where It Grows

Today, the tree grows naturally almost exclusively in southwestern Türkiye, particularly in the provinces of Muğla, Aydın, Denizli, and Antalya, with a smaller isolated population near Sütçüler in Isparta province, which has its own designated Sığla Ormanı Tabiatı Koruma Alanı (Nature Reserve). It is a near-endemic species, with its natural global distribution confined almost entirely to this region. The largest remaining forests are concentrated around the Köyceğiz, Dalaman, Marmaris, Ula, and Fethiye districts of Muğla. Notable forest pockets and gallery stands also persist in the Çetibeli area near Marmaris and around Yeşilüzümlü near Fethiye. A very small population exists on the island of Rhodes, but it is unclear whether those trees are truly wild or were cultivated at some point in the past. The most extensive and contiguous pure forests survive within the Köyceğiz-Dalyan Özel Çevre Koruma Bölgesi (Special Environmental Protection Area).

The Resin and How It Is Harvested

What makes the sığla ağacı culturally and economically significant is its resin. When the bark of the trunk is deliberately wounded, the tree produces a thick, amber-coloured balsam known as sığla yağı. This resin has been harvested for thousands of years. The process follows a careful seasonal rhythm. In late March, harvesters begin by scraping away the outer bark in a procedure called kızartma (literally "reddening," because the exposed inner bark turns red). After waiting roughly a month, shallow grooves are cut into the exposed surface in late April or early May, a step known as çekme. Over the following weeks, the tree fills these grooves with balsam. The main resin collection takes place through June and into early July. The entire process is carried out today under the supervision of the Köyceğiz Forestry Directorate, following strict regulations that try to balance production with conservation.

The harvest leaves little to waste. After the liquid sığla yağı is collected, the remaining fragrant bark is dried and burned as incense, known locally as buhur. Burning buhur to scent homes and ward off insects is a long-standing practice in the villages around Köyceğiz and Marmaris. For Turkish learners, buhur is a useful word that connects to tütsü (incense, fumigation) and the broader vocabulary of scent and ritual in Turkish daily life.

A Resin with Ancient Roots

The historical record for sığla yağı is remarkably long. In ancient Egypt, the resin was used in mummification rituals, valued for both its preservative properties and its fragrance. Later traditions associate the resin with the perfumes of Cleopatra. Ancient Greek physicians, including writers in the Hippocratic tradition, were familiar with aromatic balsams of this kind and listed them among their prescribed treatments. The resin was traded along the Mediterranean coast from the ports of ancient Caria, the region around modern Köyceğiz, Dalyan, and Marmaris.

In Ottoman times, sığla yağı continued to be harvested and traded. The forests around Muğla were a known source of this commodity, and the resin maintained its reputation in both medical and aromatic applications. Today, sığla yağı is used primarily in the international perfume industry as a fixative, the ingredient that stabilizes a fragrance and makes it last on the skin. It is also used in cosmetics and pharmaceutical products. Türkiye remains the primary commercial source of resin from Liquidambar orientalis.

An Endangered Treasure

The sığla forests have contracted severely over the past century. In 1949, the total area covered by sığla trees was estimated at around 6,300 hectares. By 2016, according to data from Turkey's General Directorate of Forestry, that figure had fallen to approximately 1,400 hectares. The causes include conversion of forest land to citrus orchards, unregulated livestock grazing, tourism-related development, and changes in water management that have lowered the water table in some growing areas. The species is classified as Endangered on the IUCN Red List, assessed in 2017 under criterion A2c due to ongoing habitat loss. Recognizing the severity of this decline, the Turkish government upgraded the protection status of key sığla habitats, designating them as Kesin Korunacak Hassas Alan (Strictly Protected Sensitive Areas) to shield them from further urban and agricultural development.

Words to Carry with You

For Turkish learners, the word günlük is a particularly useful one. In the context of this tree, it refers to the incense or resin the tree produces, possibly derived from an older loanword associated with incense and aromatic resins, which evolved over time to sound identical to the Turkish word for "daily." In everyday modern Turkish, günlük means "daily" and also means "diary" or "journal" (günlük tutmak means "to keep a diary"). The overlap is coincidental in modern usage, but it means learners will encounter the same word in very different settings. Recognizing that günlük can refer to incense, to a daily routine, and to a personal journal gives learners a sense of how Turkish words can carry multiple layers of meaning depending on context.

The word sığla itself is less common in daily speech, but it appears in regional place names and ecological discussions. The word amber, borrowed from Arabic, is used in Turkish in the same sense as in English, referring to the fossilized resin or to warm, golden-brown tones in colour and fragrance descriptions.

The sığla ağacı is a tree that has outlasted ice ages, empires, and trade routes. It still grows in the same river valleys where it was harvested in antiquity. For learners of Turkish, it connects vocabulary, geography, ancient history, and the modern perfume industry in a single entry, rooted in one specific corner of southwestern Anatolia.