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Three samples of Equato-Guinean rain forest have recently been studied under the project of CUREF (Conservacion y Utilizacion Racional de los Ecosistemas Forestales de Guinea Ecuatorial). The rain forest of the Altos de Nsork region, in the eastern part of Equatorial Guinea, has been studied by the present author by 1 km long transects. The two other studies have been carried out by others at the rio Muni's estuary (southwestern part of the country) and in the Ndote reserve (central-western part). A total of 9970 trees with DBH ≥ 30 cm, belonging to 341 species determined at least to genus, were found on 93.5 ha. To take the vegetation variability of each site into account, a phytosociological table was established using TWINSPAN with twenty surveys of 160 × 10 m for DBH ≥ 10 cm trees, chosen in homogeneous parts of transect. The following species were found to be prominent in the zone near the coast: Desbordesia glaucescens, Calpocalyx heitzii, Alstonia congensis, Sacoglottis gabonensis, Anthostema aubryanum, Erythrophleum ivorense, Caloncoba glauca, Lophira alata, Croton oligandrus, etc. The species found to have a continental distribution included: Millettia laurentii, Sindoropsis letestui, Entandrophragma congoense, Celtis tessmannii, Dialium pachyphyllum, Dialium spp., Allanblackia floribunda, etc. Because of the abundance of these species, Nsork represents the most continental part of the lowerguinean atlantic region. The forests of the rio Muni' s estuary show a huge biodiversity because of their intermediate position and their rich habitat diversity.

Summary. Two new genera, Chiarinia and Sennia, and three new species, Chiarinia jubae-fluvii, Sennia sciap-sciaple and Filicium somalense, were described by Chiovenda in his Flora Somala. In the present paper it is shown that Chiarinia is a synonym of Lecaniodiscus Planch. ex Benth. (Sapindaceae), as C.jubae-fluvii is conspecific with L.fraxinifolius Baker, that Sennia is a synonym of Dialium L. (Leguminosae subfam. Caesalpinioideae), as S. sciap-sciaple is conspecific with D. orientale Bak. f., and that Filicium somalense is conspecific with Haplocoelum inopleum Radlk. (Sapindaceae). All three species are members of the coastal forests of East Africa. No nomenclatural changes are necessary because of these identifications. A number of Sapindaceous trees described by Chiovenda from the southernmost part of Somalia have until now only been known from the type collections. The trees were found in riverine or coastal forest. It seemed likely that these species would also occur in Kenya, in which country there are more considerable areas of these forests than in Somalia. A study of the type specimens at the University Herbarium of Florence (FI), combined with studies of East African material at Kew, has shown that this assumption was correct, and two monotypic genera and one species are here identified with East African taxa.