African Plant Database

Acacia seyal Delile
Family : Mimosaceae
Protologue : Descr. Egypte, Hist. Nat. 2: 286 (1813)  
Information on the genus : Acacia
Status for NA : accepted (present)
Status for TA : accepted (present)
Synonym(s) Homotypic
 Acacia seyal Delile var. seyal
 Acacia flava var. seyal (Delile) Roberty
 Vachellia seyal (Delile) P.J.H. Hurter (2008)
Synonym(s) Heterotypic
=Acacia stenocarpa Hochst. ex A. Rich.
Taxon infra-specific
Acacia seyal var. fistula (Schweinf.) Oliv.
Acacia seyal Delile var. seyal
Ecology and distribution
Trop. Afr.
Biology : Tree (2-)3-12(-17) m, loosely branched, with flattened spreading crown; bark on trunk (to 60 cm in girth, 20 cm Ø) smooth, covered with a white to greenish-yellow or orange-red powdery layer disappearing with time to reveal green inner bark;
  see more in the book
Ecology : Wooded grassland, on dry cracking soils; shrub savanna; forming pure stands on dark clay soils; 1000-2150 m alt. (var. seyal; Sudan, Ethiopia, E. Africa); dry bushland, often with Tarchonanthus, common, etc...
  Variable in colour of bark (also due to grass-fires). "Ant-galls" absent in var. seyal.
  Algeria; SE Egypt; S Arabia; not in Israel. Records from C and S Somalia seem to be based on A. zanzibarica. Not in Centr. Afr. Rep. (= A. hockii).
  Comprises 2 vars. - Var. seyal ("ant-galls" absent) in W, N and E part of range; var. fistula (Schweinf.) Oliv. (bas.: A. fistula Schweinf.) with 2-lobed "ant-galls" in E part of range, extending into SE.
  Mc ALLAN, A. & al. (1993). Acacia seyal. A handbook for extension workers. School of Agriculture and Forest Sciences, University of Wales, Bangor. 30 pp.
  Can be confused with A. hockii. The hybrid var. fistula x A. xanthophloea , a tall tree with fasciculate flower heads and variable pods, has been recorded from S Malawi.

Bibliography for Tropical Africa :
  • Peyre de Fabrègues B. & J. P. Lebrun (1976). Catalogue des plantes vasculaires du Niger. Maison Alfort
  • Boudet G. & J.P. Lebrun (1986). Catalogue des plantes vasculaires du Mali. Etudes et Synthèses IEMVT 16
  • Cat. Pl. Vasc. Burkina Faso:180, 214, 256 (2012)

Bibliography for North Africa :
  • CELLES, J. C. & R. MANIÈRE (1980). Remarques sur la distribution en Afrique nord-occidentale d'Acacia seyal Delile et d'Acacia ehrenbergiana Hayne. Candollea 35: 183-200
  • OZENDA, P. (1983). Flore et végétation du Sahara. Centre National de la Recherche Scientifique, Paris.
  • Med-Checklist 4: 3 (1989).
  • LEBRUN, J. P. (1998). Catalogue des plantes vasculaires de la Mauritanie et du Sahara occidental. Boissiera 55: 126
  • Fl. Egypt (Boulos) 1: 369 (1999).
  • SAHKI, A. & R.SAHKI (2004). Le Hoggar, promenade botanique
More info on :
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see under The Euro-Mediterranean Plant Base
see under Flore d'Afrique Centrale
see under African Plants - a Photo Guide
see under Herbarium, North Africa MPU
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Record n°145546
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