Arabian Frankincense: The Sacred Boswellia of Ancient Trade

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• Family:	Burseraceae
  Genus:	Boswellia (bos-WELL-ee-a) (Info)
  Species:	sacra

Overview

Arabian Frankincense (Boswellia sacra, syn. B. carteri) is the **primary source of true frankincense**—the legendary aromatic resin that has been traded for over 5,000 years, valued in ancient Egypt, Rome, and the great religions for incense, medicine, and ceremony. Native to the **arid, fog-washed coastal mountains of Oman, Yemen, and Somalia**, it is a tree of extreme environments and profound history.

Tree Form & Adaptations

A **gnarled, low-branching, deciduous tree** (15–25 feet), often growing from rocky crevices. The bark is **papery, peeling, gray-white**—reflecting intense sun. Leaves are **pinnately compound, clustered at branch tips**, dropping in the dry season. The tree survives on **seasonal fog drip (khareef)** and minimal rainfall, with a deep, exploratory root system.

Frankincense Harvest

Resin is harvested by **making shallow incisions in the bark**. The exuded sap hardens into **teardrop-shaped "tears"**—pale yellow to amber, translucent. These are graded by color, size, and purity. The resin contains **boswellic acids** (anti-inflammatory) and volatile oils (incense fragrance). Sustainable harvesting is critical; over-tapping kills trees.

Flowers & Cultivation

Small, white, 5-petaled flowers with yellow centers appear in axillary racemes. Fruit is a 3-valved capsule.

**Cultivation is extremely challenging outside its native niche**: requires **arid, frost-free winters (Zone 10+), intense sun, perfectly drained mineral soil, and a distinct dry season**. Rarely grown ornamentally; primarily a conservation and sustainable harvest species. A living link to the ancient incense routes—more miracle than garden plant.