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The woody flora of the National Park of Manda in the Sudanian area of Chad has been characterized between October and December 2016 to know its floristic diversity, and to quantify its aerial woody biomass. The transect and quadra method (1m x 1m) were simultaneously adopted for this study. The pan-tropical equation of Chave et al. made it possible to evaluate the carbon stocks in different sites. The study of the flora species identified 45 species divided into 37 genus and 21 families for an average population density of 355 individuals/ha. Three classes of the diameter dominate the settlement: class ≤ 10 cm; class of 10-20 cm and class of 20-30 cm. The height classes belong to the class of plants ≤ 4 m; and at last having a height ≤ 7 m. The basal area was 5.86 m2 / ha. It appears that the woody components store 23.82 ± 0.01 tC / ha, the undergrowth 0.14 ± 0.01 tC / ha and the litter 0.56 ± 0.01 tC / ha. This research is a contribution to the REDD+ process (Reducing Emissions from Deforestation and Forest Degradation).

International audience; The tall-palm is a woody tree which one found in islets of stand in the natural vegetation in the localities of Ngam, Goundi, Kimri, Houndouma in Chad. Its trunk, being able to exceed 15m height, is used in the frames of the traditional and semi-modern housings. However, little of scientific and technical works have been performed on this wood to allow its rational use. This paper focuses on the determination of its anatomic and chemical features for the understanding of the physical and mechanic behavior of this wood. Anatomical analyses allowed us to quantify by mean 124 fibers per cm 2 in the duramen and 77 fibers per cm 2 in the sapwood. Chemical analyses performed equally allowed to determine a mean rate of:-63.21 % of cellulose in the duramen and 61.89 % in the sapwood;-9.60 % of hemicelluloses in the duramen and 11.32% % in the sapwood;-19.36% of lignin in the duramen and 19.68% in the sapwood.

International audience; The tall-palm is a woody tree which one found in islets of stand in the natural vegetation in the localities of Ngam, Goundi, Kimri, Houndouma in Chad. Its trunk, being able to exceed 15m height, is used in the frames of the traditional and semi-modern housings. However, little of scientific and technical works have been performed on this wood to allow its rational use. This paper focuses on the determination of its anatomic and chemical features for the understanding of the physical and mechanic behavior of this wood. Anatomical analyses allowed us to quantify by mean 124 fibers per cm 2 in the duramen and 77 fibers per cm 2 in the sapwood. Chemical analyses performed equally allowed to determine a mean rate of:-63.21 % of cellulose in the duramen and 61.89 % in the sapwood;-9.60 % of hemicelluloses in the duramen and 11.32% % in the sapwood;-19.36% of lignin in the duramen and 19.68% in the sapwood.

The partial faunal reserve of Pama is situated in the province of Kompienga, in the South-East of Burkina Faso, with typical Sudanian savanna vegetation. Adjacent to the Arli National Park and the Pendjari National Park, it is part of the so-called WAP complex, one of the largest wildlife areas in West Africa. Up to now, only little has been known about its flora. The present study aimed at reducing this gap in knowledge, and represents an important tool for conservation and research. The list of species was compiled from the surveys carried out from 2001 to 2004, additional relevé data, and herbarium specimens. We found 450 species, which belong to 244 genera and 73 families. The most species-rich family is Poaceae (83 species), followed by Fabaceae (64), Cyperaceae (24), Rubiaceae (22), Euphor- biaceae (20), Combretaceae (15), Asteraceae (14), Caesalpiniaceae (14), Mimosaceae (12), and Convolvulaceae (11).

L’analyse de dix groupements ligneux et dix espèces dominantes a été faite du nombre de tiges à l’hectare et des classes de diamètre des populations correspondantes. Il ressort que les groupements les plus denses sont ceux à Combretum nigricans Lepr. ex Guill. & Perr., Anogeissus leiocarpus (DC.) Guill. & Perr., Acacia hockii De Wild. et A. dudgeoni Craib. ex Holland, tandis que les moins denses sont ceux à Gardenia ternifolia Schumach. & Thonn., Vitellaria paradoxa C. F. Gaertn. et Piliostigma thonningii (Schumach.) Milne-Redh. La répartition des individus en classes de diamètre a révélé que tous les groupements sont stables, c’est-à-dire capables de se renouveler par la régénération naturelle. Mais la structure des espèces dominantes présente beaucoup d’irrégularités liées à leurs exigences écologiques, aux feux de brousse et aux attaques d’éléphants. Toutefois, la plasticité écologique et la biologie de certaines espèces leur confèrent assez de structures de populations stables., Flora et Vegetatio Sudano-Sambesica, Vol 11 (2008)