long Calyx broadly cupular, margin obscurely 5-toothed. 
Petals short, obtuse, cohering in a deciduous operculum. 
Stamens 4-5. Disk tumid, with an obscurely 4-5-lobed 
very depressed central style.—J. D. H. 
Fig. 1, Flower; 2, the same with the operculate corolia raised; 3, flower 
with the petals removed; 4, calyx, ovary and disk showing the style; 
5, vertical section of ovary :—Al/ enlarged. 
