Fig. 24: Crinum x submersum Herbert is a natural hybrid
found in Brazil. It is an obvious cross of C. scarbrum and
C. americium, and is quite sterile. Numerous duplicate crosses,
man-made or hummingbird pollinated, have appeared since Herbert's time.
The variants amongst both C. americanum and C. scabrum result
in significant diversity as shown in Figures 25 and
26 below. Usually the petals are intermediate in form,
indicating some intermixing of genes.