P. interius monophyllum, quinquesidum campanulatum; segmentis semiovatis.
Corolla monopetala, ovata, semiquinquesida; limbo parvo, revoluto.
Nectarium corpusculis decem, subulatis, erectis, brevissimis, cingentibus germen intra stamina.
Stamina. Filamenta decem, subulata, incurva, corolla breviora; receptaculo inserta. Antheræ bicornes; corniculis bifidis.
Pistillum. Germen subrotundum, depressum. Stylus cylindricus, longitudine corollæ. Stigma obtusum.
Pericarpium. Capsula subrotunda, obtusa, pentagona, depressa, quinque locularis, quinque valvis, undique tecta perianthio interiore transformato et enato in baccam subrotundam, coloratam, apice perviam.
Semina plurima, subovata, angulata, ossea.
Empalement. Cup double, close together, remaining.
Outer Cup two leaved, shorter; leaflets half egg-shaped, concave, and blunt.
Inner Cup one leaf, five-cleft, bell-shaped; segments half egg-shaped.