What is "prismatomeris"

Prismatomeris is a genus of plant in family Rubiaceae. It contains the following species (but this list may be incomplete):

• Prismatomeris andamanica, Ridley
• Prismatomeris albidiflora Thwaites
• Prismatomeris beccariana (Baill. ex K.Schum.) J.T.Johanss.
• Prismatomeris brachypus Ridl.
• Prismatomeris connata Y.Z.Ruan
• Prismatomeris filamentosa Craib.
• Prismatomeris fragrans Geddes
• Prismatomeris glabra (Korth.) Valeton
• Prismatomeris griffithii Ridl.
• Prismatomeris javanica (Valeton) Ridl.
• Prismatomeris kinabaluensis J.T.Johanss.
• Prismatomeris memecyloidesCraib.
• Prismatomeris mollis Craib
• Prismatomeris obtusifolia Merr.
• Prismatomeris robusta J.T.Johanss.
• Prismatomeris tetrandra(Roxb.) K. Schum.
• Prismatomeris tetrandra subsp. malayana(Ridl.) J.J.Johanss.
• Prismatomeris sessiliflora Pit.