ANALYSE PHYTOGÉOGRAPHIQUE DES PTÉRIDOPHYTES D’AFRIQUE CENTRALE: CAS DES ÉTAGES DES MONTAGNES DU PARC NATIONAL DE KAHUZI-BIEGA (RÉPUBLIQUE DÉMOCRATIQUE DU CONGO)

This study comprises a phytogeographical analysis of forest ferns and their allies of the Kahuzi Biega National Park (KBNP), located in Democratic Republic of Congo (DRC). The phytogeographical and floristic affinities and dissimilarities were investigated for forested areas of the Albertine Rift, Continental Africa and some mountainous areas outside of Africa. This analysis was based on herbarium material collected in the mountains of KBNP (5987 specimens) and housed in various herbaria in Belgium, the Democratic Republic of Congo (DRC) and the Netherlands. The results showed that the majority of ferns in the mountains of the KBNP are also found in many other African areas (52.1% of the flora). Further, 41.9% of the species have a wide distribution outside of Africa, while endemic and sub-endemic species represent a mere 6% of the fern flora of KBNP. Within the related species, some showed a disjunction between the mountainous areas of Cameroon and the PNKB. The mountains of the Kivu- Ruwenzori area show greatest affinity between each other as well as other mountainous regions in western and southern Africa. The sub-montane zone of the PNKB is considered to be a transitional area between the Kahuzi mountain range and other regional centers of endemism

Floral ontogeny links Dialypetalanthus (Condamineeae) with the floral developmental morphology of other Rubiaceae

Background – Vegetative and fruit characters of the Amazonian genus Dialypetalanthus point to a position in Rubiaceae. However, its floral morphology is so deviant that the genus was often placed in a family of its own. Even relationships outside Gentianales were postulated. Current molecular phylogenetic studies firmly show that Dialypetalanthus belongs to Rubiaceae. Aims – This study aims to understand the idiosyncratic floral morphology in Dialypetalanthus and to compare it with the floral development in two other Condamineeae genera as well as in other Rubiaceae for which ontogenetic data are available. Material and methods – SEM and LM based floral ontogeny in Dialypetalanthus fuscescens, Mussaendopsis beccariana, and Pogonopus exsertus. Results and main conclusions – Flowers in Dialypetalanthus develop a stamen-corolla-calyx tube, which can be considered as a floral morphological link between the genus and the other Rubiaceae. The polyandrous androecium originates from an annular intercalary meristem at the adaxial side of the stamen-corolla-calyx tube

ÉTUDES ETHNOBOTANIQUE ET ETHNOLINGUISTIQUE DES RESSOURCES FORESTIÈRES LIGNEUSES UTILISÉES PAR LA POPULATION DU COULOIR ÉCOLOGIQUE DU PARC NATIONAL DE KAHUZI-BIEGA (R D. CONGO)

This article focuses on the use and the vocabulary of 323 specimens representing 52 species woody species that were collected from three ethnosocio-linguistic groups (Shi, Tembo and Pygmies) living in the ecological corridor of Kahuzi -Biega National Park (KBNP). This area consists of a transitional forest between the vegetation of the plains and the mountains. The study has shown that the food and, pharmacological knowledge are almost detained by the pygmies. The analyses carried out show that this population takes interest to the forestry species they consider to be useful though they are found in a protected area. The total ethno botanical value of species is not really significantly to different ethno-socio-linguistic group to another (p-value = 0.514; F = 1.08 and df = 3). The Kruskal-Wallis test shows that the different organs do not have the same importance for the use of the population. (F = 1.08 and df = 3). The correlation between the ethno botanical use value in relation to the number of species use is significant (R² = 0.084%). Specific vocabularies ethnonymical in Mashi and Kitembo express the same common meanings of species on the formal and semantic plans. These three tribes share several ethnonymical concepts, which could be a symbol indication of the subsistence of a pygmy original language, forgotten to the Bantu languages that have borrowed them. Despite the importance of trees in the hall of the Park, we suggest conservative actions or reforestation could protect

ÉTUDES ETHNOBOTANIQUE ET ETHNOLINGUISTIQUE DES RESSOURCES FORESTIÈRES LIGNEUSES UTILISÉES PAR LA POPULATION DU COULOIR ÉCOLOGIQUE DU PARC NATIONAL DE KAHUZI-BIEGA (R D. CONGO)

This article focuses on the use and the vocabulary of 323 specimens representing 52 species woody species that were collected from three ethnosocio-linguistic groups (Shi, Tembo and Pygmies) living in the ecological corridor of Kahuzi -Biega National Park (KBNP). This area consists of a transitional forest between the vegetation of the plains and the mountains. The study has shown that the food and, pharmacological knowledge are almost detained by the pygmies. The analyses carried out show that this population takes interest to the forestry species they consider to be useful though they are found in a protected area. The total ethno botanical value of species is not really significantly to different ethno-socio-linguistic group to another (p-value = 0.514; F = 1.08 and df = 3). The Kruskal-Wallis test shows that the different organs do not have the same importance for the use of the population. (F = 1.08 and df = 3). The correlation between the ethno botanical use value in relation to the number of species use is significant (R² = 0.084%). Specific vocabularies ethnonymical in Mashi and Kitembo express the same common meanings of species on the formal and semantic plans. These three tribes share several ethnonymical concepts, which could be a symbol indication of the subsistence of a pygmy original language, forgotten to the Bantu languages that have borrowed them. Despite the importance of trees in the hall of the Park, we suggest conservative actions or reforestation could protect