Among the bud, base, and stalk tissue groups divided from
cross-sections of young FBs, only the base tissue group
produced shoots and plants. There were two unequal-sized
floral bracts at the node of FB in all the hybrids we examined.
The small bract of the first FB was a lateral bract that harbored
at its base a new miniature-sized FB with its own miniaturesized
small bract, which further harbored a primitive FB. This
pattern reiterated, resulting in multiple flowers. We believe
that the plants were derived from these new dome-shaped,
meristem-like FBs. This would explain why only the base
tissue group was capable of producing the plants because it
was the only group that contained such structures.