Helictosperma poissoniana. A flowering branch B dimorphic stipules of vegetative and reproductive nodes C short-shoot bearing young infructescence D bracteole, ovary and calyx E corolla, style, stigma and anthers F fruit G placenta and ovules, abaxial view H placenta and ovules, adaxial view. A, C De Block & Rakotonasolo 797 B De Block 910 D, E Jongkind et al. 3415 F Randriamiera 8795-RN G, H Jongkind et al. 3258.

 
 
  Part of: De Block P, Rakotonasolo F, Ntore S, Razafimandimbison SG, Janssens S (2018) Four new endemic genera of Rubiaceae (Pavetteae) from Madagascar represent multiple radiations into drylands. PhytoKeys 99: 1-66. https://doi.org/10.3897/phytokeys.99.23713