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Gnetum africanum Welw. (Gnetaceae) is a forest vine that is highly valued for its leaves which are a source of food and income. Because wild populations are threatened by over-harvesting, there is an increasing need to cultivate the plant, which in turn entails a need for developing good quality planting material. This study investigates the effects of four provenances, four substrates and their interactions on rooting and shoot development of vine cuttings of G. africanum using the non-mist propagation system developed by ICRAF. Single-node, half-leafed vine cuttings were used and data on rooting and leaf production were collected monthly from the second to the fifth months. Rooting percentages were subjected to analysis of variance using logistic regression procedures in Genstat version 12. Provenance (P<0.001), substrate (P<0.001) and interaction between provenance and substrate (P<0.001) showed highly significant effects on rooting. Excel was used to determine rooting percentages, with the highest observed in fine sand on cuttings from Lekie- Assi (81%) and Boumnyebel (79%) which are high G. africanum exploitation areas in the Centre Region of Cameroon. Boumnyebel showed a signficantly higher shoot development than the other provenances. Fine sand and sharp sand can be recommended for rapid, low-cost production of G. africanum planting material. Key words: domestication, rooting substrate, non-mist propagator, vine cuttings

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This study has been conducted at Kimvula city. The goal was to investigate the medicinal plants used in that city. Thus, any ethnobotanical survey has been realized on the use of the plants in six towns by direct interviews among 180 peoples with an average of age comprise between 17- 70 years old with high representatives of women. This study has allowed us to establish a floristic list of 188 medicinal species belonging in 158 genera and 69 families where Fabaceae dominant group. Anemia was indications mostly cited as a sickness threated by using plants. Concerning the characteristics of the treatment preparation, leaves are the plant’s organs mostly used; decoction is the preparation way cited and the oral admistration is the administration way for those medicinal drugs. Morinda morindoides, Ocimum gratissimum, Disphania ambrosioïdes and Moringa oleifera have the VAUs superior or eaual to 1.10. There is not a link concerning the use of plants between the inhabitant of group 1 and the inhabitant of group 2. By the wah, that there is a link concerning the use of plants between the Lona, Winda, Pado, Revolution and Kinata neighborhoods (Group 2). Three sspcies characterized the group 1 like: Clematis hirsuta, Saccharum officinarum and Voacanga africana, and four especies Ceiba pentandra, Indigofera paracapitata, Maprounea africana and Ochna afzelii characterized the group 2.

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