Uvariopsis dicaprio (Annonaceae) a new tree species with notes on its pollination biology, and the Critically Endangered narrowly endemic plant species of the Ebo Forest, Cameroon Author Gosline, George Science, Royal Botanic Gardens, Kew, Richmond, Surrey, United Kingdom Author Cheek, Martin Science, Royal Botanic Gardens, Kew, Richmond, Surrey, United Kingdom Author Onana, Jean Michel Faculty of Science, Department of Plant Biology, University of Yaoundé I, Yaoundé, Cameroon & National Herbarium of Cameroon, IRAD, Yaoundé, Cameroon Author Ngansop Tchatchouang, Eric National Herbarium of Cameroon, IRAD, Yaoundé, Cameroon Author van der Burgt, Xander M. Science, Royal Botanic Gardens, Kew, Richmond, Surrey, United Kingdom Author MacKinnon, Lorna Science, Royal Botanic Gardens, Kew, Richmond, Surrey, United Kingdom Author Dagallier, Léo-Paul M. J. DIADE, Univ Montpellier, CIRAD, IRD, Montpellier, France text PeerJ 2022 e 12614 2022-01-06 9 1 21 http://dx.doi.org/10.7717/peerj.12614 journal article 10.7717/peerj.12614 7060b6b9-6c3c-40db-8d4a-fd8cac9493b7 PMC8743011 35036131 5832101 Key to the species of Uvariopsis (and Dennettia ) in Cameroon 1. - Crushed leaves emitting a strong citrus scent...................................................... U. citrata - Crushed leaves without citrus scent............................................................................................2 2. - Leaf blades 7.2 – 15.5(– 18) cm long; pedicel 0 – 7(– 9) mm long..............................3 - Leaf blades (11.1 –)16.3 – 38(– 61.5) cm long, pedicel (3 –)8 – 60(– 450)mm long 6 3. - Flowers cauliflorous, pedicel 0 – 2 mm long................................................. U. sessiliflora - Flowers ramiflorous, pedicel (0 – 2)3 – 11 mm long, sometimes cauliflorous.................4 4. - Flowers bisexual, petals 3 (– 4).............................................................. Dennettia tripetala - Flowers unisexual, petals 4............................................................................................................5 5. - Young branches glabrous or very sparsely pubescent, petals free ............... U. congensis - Young branches densely to sparsely pubescent, petals basally fused................. U. zenkeri 6. - Petals basally fused......................................................................................................................7 - Petals free.........................................................................................................................................10 7. - Petals 3..................................................................................................................... U. congolana - Petals 4...............................................................................................................................................8 8. - Flower buds globose, monocarps verrucose................................................ U. pedunculosa - Flower buds conical to pyramidal, monocarps smooth..........................................................9 9. - Sepals 5 – 10 mm long, flowers completely covering base of trunk, generally occurring above 800 m a.s.l....................................................................................................... U. submontana - Sepals 2 – 4 mm long, flowers partially covering base of trunk, generally occurring below 800 m a.s.l...................................................................................................................... U. korupensis 10. - Flowering pedicels 3 – 8 mm long......................................................................................11 - Flowering pedicels 10 – 160 mm long......................................................................................12 11. - Petals linear, 25 – 45 mm long, more than 6 times longer than wide........................... ........................................................................................................................................... U. bakeriana - Petals elliptic to ovate, 10 – 14 mm long, less than 6 times longer than wide................... .............................................................................................................................................. U. etugiana 12. - Flower buds globose .................................................................................................. U. dioica - Flower buds conical or narrowly ovoid to pyramidal...........................................................13 13. - Stems and petioles tomentose, lateral nerves 8 – 13 on each side of the midrib; flowers wine brown........................................................................................................................ U. solheidii - Stems and petioles glabrous; lateral nerves 5 – 8(– 9) on each side of the midrib; flowers green-yellow ....................................................................................................................... U. dicaprio