Nelumbo v. Amborella
From CoGepedia
Interestingly, SynFind's syntenic depth calculation shows:
Syntenic Depth: Nelumbo nucifera (sacred lotus) Depth 1 5222 of 18684 27.95% Depth 2 11809 of 18684 63.20% Depth 3 1217 of 18684 6.51% Depth 4 406 of 18684 2.17% Depth 5 24 of 18684 0.13% Depth 6 6 of 18684 0.03%
Shows that there may be a 1:4 amborella to Nelumbo. This would mean that Nelumbo is a double tetraploidy.