Cephalanthus glabrifolius. A. Flowering branch. B. Flower. C. Unfolded corolla. D. Hypanthium, style, and stigma. E. Longitudinal section through the hypanthium. F. Stamen. G. Dorsal view of schizocarp. H. Ventral view of the mericarp. I. Longitudinal section through the schizocarp. J. Dorsal view of seed with aril. K. Subventral view of seed with aril. L. Lateral view of seed with aril. Drawn by Laura Simón.

 
 
  Part of: Romero MF, Gonzalez AM, Salas RM (2023) Sylvainia, a new monospecific genus within the subtribe Cephalanthinae (Rubiaceae, Naucleeae). Plant Ecology and Evolution 156(1): 85-111. https://doi.org/10.5091/plecevo.90423