Adolf-Friedrich's hackberry (Celtis adolfi-friderici)

Diania African celtis
Silhouette: T. Michael Keesey / License

Celtis adolfi-friderici: Botanical Characteristics and Habitat

The impressive canopy of the tropical African forests is often graced by this monumental tree, which can reach towering heights of up to 55 meters. Its extensive root system features prominent, broad buttress roots that anchor the massive trunk, sometimes exceeding a meter in diameter. The smooth, grayish bark contrasts with the dense foliage that provides shade in its native habitat. Found predominantly at elevations ranging from 600 to 1,200 meters, it thrives in various wet forest ecosystems across the African continent.

Taxonomy

  • ∟ царство Plantae
  • ∟ division Tracheophytes (Vascular Plants)
  • ∟ subdivision Spermatophytes (Seed plants)
  • ∟ Angiosperms
  • ∟ mesangiosperms
  • ∟ eudicots
  • ∟ Superrosids
  • ∟ rosids
  • ∟ order Rosales
  • ∟ family Cannabaceae (Hemp family)
  • ∟ genus Celtis (Hackberry)
  • ∟ species Celtis adolfi-friderici (Adolf-Friedrich's hackberry)

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Morphology

The foliage consists of simple, leathery leaves that are arranged alternately along the stems. Each leaf is obovate to elliptic in shape, measuring 8 to 16 centimeters in length, with an entire margin and a pointed to acuminate tip. The leaf surface is nearly glabrous, though the underside can feel slightly rough to the touch, and features a short petiole up to 2 centimeters long.

Functionally monoecious, the tree produces small, axillary panicles heavily laden with white-greenish, 5-merous flowers. These tiny, sessile blooms lack true petals and instead feature slightly hairy tepals. Following successful pollination, the plant develops small, rounded to ovoid drupes up to 2 centimeters in size. These fleshy fruits turn a yellowish-red hue upon maturity and contain a single, brownish, textured stone.

Applications

The timber, known in the trade as African celtis or diania, is light-colored and of medium weight. Although not naturally durable, the wood responds well to preservative treatments, making it suitable for various local construction and carpentry needs. Additionally, the seeds are reported to be edible, and both the leaves and bark have traditional medicinal applications among local communities.

Interesting facts

The specific epithet honors Adolf Friedrich, Duke of Mecklenburg, who led significant scientific expeditions into Central Africa during the early 20th century. Despite its massive size and widespread distribution across multiple African nations, it remains a primarily wild species deeply integrated into its native forest ecosystems.

Geography of distribution

  • Democratic Republic of the Congo
  • Gabon
  • Ghana
  • Guinea
  • Ivory Coast
  • Cameroon
  • Liberia
  • Republic of the Congo
  • Central African Republic
  • Sudan
  • South Sudan
  • Uganda
  • Nigeria
  • Sierra Leone
  • Saudi Arabia
  • Yemen

Sources

  • Plants of the World Online (POWO)
  • Global Biodiversity Information Facility (GBIF)

Technical Information

External Databases: GBIF, POWO, Tropicos

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