Bursera fagaroides

Geographic & Climate

• Geographic Coordinates: Southern Arizona, USA to southern Mexico (Sonora to Oaxaca), approx. 14°N to 32°N, 96°W to 114°W

• Climate Classification: Arid and Semi-Arid / Subtropical Desert (BWh / BSh)

• Habitat Characteristics: Found in Sonoran Desert scrub, tropical deciduous forests, and arroyos from sea level up to 800 meters elevation. Thrives in shallow, well-draining rocky soils and dry limestone cliffs with long, harsh dry seasons.

Botanical Morphology

• Diagnostic Features: Large shrub or small tree growing up to 10 meters tall featuring a swollen, caudiciform-like trunk with smooth green inner bark covered by exfoliating, papery, red-tinged outer bark. Leaves are alternately arranged and pinnately compound, consisting of 5 to 11 narrow, elongated leaflets that differentiate it from other related species like Bursera microphylla. Flowers are small, white to yellowish-green, producing gray-brown triangular drupes that split to reveal a single red seed.

• Growth Habit: Deciduous woody perennial with a rapid growth rate during warm summer months when provided ample water; undergoes a distinct winter dormancy where foliage drops. Hardiness down to -4°C.

History & Etymology

• Etymology: The genus name Bursera honors the German botanist Joachim Burser (1583–1639). The specific epithet fagaroides means "resembling Fagara" (referencing the wild lime genus Zanthoxylum), due to the striking similarity in the scent of its crushed foliage.

• Historical Context: Commonly known as the torchwood copal or Mexican frankincense, its aromatic resins and fragrant leaves have historically been utilized for incense and local traditional applications. It has become a premier specimen plant and popular caudiciform subject in international horticulture and bonsai culture.