Vachellia etbaica
Vachellia etbaica is a thorny shrub or tree in the pea family, Fabaceae, native to northeastern and eastern Africa and the Arabian Peninsula. Its African range extends from southeastern Egypt to Tanzania. It was first named Acacia etbaica in 1868 and transferred to Vachellia in 2013.[1]
Description
Regional floras describe a tree reaching about twelve metres, with rough dark bark and a rounded or flattened crown. The thorns vary: some plants have mostly short, hooked spines, while others also bear longer, straight ones. The twice-divided leaves contain many small paired leaflets.[2]
White or cream flowers form compact rounded heads. The straight pods are brown to purplish, usually 2–12 cm long, and split when mature. Fine veins cross their surfaces. The seeds are flattened and nearly circular.[2]
Variation and habitat
Kew recognises four subspecies: etbaica, australis, platycarpa and uncinata. These subdivisions sit within one accepted species.[1] The floristic accounts associate it with dry bushland, thicket and scrub woodland in the Somali–Masai region.[2]
Restoration research
In Tigray, northern Ethiopia, researchers tested whether adding biochar—charcoal prepared for use in soil—helped planted seedlings. Their experiment at Mekelle compared untreated soil with soil receiving one kilogram of biochar per seedling. After fourteen months, harvested V. etbaica seedlings in the biochar treatment had greater total dry mass. Height and stem-base diameter did not differ significantly between treatments.[3]
Survival was harder to interpret: animals removed some seedlings, especially in one biochar-treated block. The researchers recorded evidence of hare activity. The study therefore does not establish a general survival advantage from biochar for this species.[3]
A separate nine-month mesh-house experiment in central Ethiopia compared four Vachellia species grown in degraded local soil. In that experiment, V. etbaica performed least well on the combined growth and root-symbiosis measures used to judge suitability for restoration. This was a comparison of seedlings under particular conditions, not a finding that the species has no value in its natural habitat.[4]
References
- ↑ 1.0 1.1 Royal Botanic Gardens, Kew. “Vachellia etbaica”. Plants of the World Online. Accessed 9 October 2026.
- ↑ 2.0 2.1 2.2 Royal Botanic Gardens, Kew. “Vachellia etbaica”: Flora of Somalia and Flora of Tropical East Africa treatments. Accessed 9 October 2026.
- ↑ 3.0 3.1 Kayama, M.; Abebe, B.; Birhane, E. (2021). “Effects of Biochar on the Growth of Vachellia etbaica and Faidherbia albida Planted in Tigray, Northern Ethiopia”. JARQ 55(4): 367–378. doi:10.6090/jarq.55.367. Accessed 9 October 2026.
- ↑ Asmelash, F.; Getachew, E. (2022). “Suitability of selected legume (Vachellia spp.) tree species for forest restoration in the Central Ethiopian highlands”. Nusantara Bioscience 14: 195–202. Abstract. Accessed 9 October 2026.