Uvariopsis Engl. & Diels 1899

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
Published as part of Gosline, George, Cheek, Martin, Onana, Jean Michel, Ngansop Tchatchouang, Eric, van der Burgt, Xander M., MacKinnon, Lorna & Dagallier, Léo-Paul M. J., 2022, 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, pp. 1-21 in PeerJ (e 12614) (e 12614) 9 on page 8, DOI: 10.7717/peerj.12614, http://zenodo.org/record/5832101