Piptostigma multinervium A habit, note numerous cauliflorous inflorescences along the trunk B base of leaf blade, upper side C base of leaf blade, lower side D flower, one inner petal removed E inflorescence with numerous flowers. Piptostigma oyemense F habit, note single flowered inflorescence G base of leaf blade, upper side H base of leaf blade, lower side I flower, note single flowered inflorescences J detail of receptacle, note 4 carpels K fruit, note white echinate to muricate monocarps A–E Couvreur 616, Ebo, Cameroon F, I–K Couvreur 917, Gabon G, H Couvreur 1139, Gabon. Photos Thomas L.P. Couvreur.