Parainvolucrella scabra (Wall. ex Kurz) M.D. Yuan & R.J. Wang A habit B leaf adaxial (left) and abaxial (right) surface C stem and stipule D infructescence with four involucral leaves E infructescence with bracts F calyx with bracteole at base G–I longistylous flower J–L brevistylous flower M, N fruits O seeds.

 
 
  Part of: Xu Y-D, Yuan M-D, Wang R-J (2021) Morphology and molecules support the new monotypic genus Parainvolucrella (Rubiaceae) from Asia. PhytoKeys 180: 53-64. https://doi.org/10.3897/phytokeys.180.67624