Look at these two flowers. Can you tell the difference between
them? They appear similar in the flower shape, number of petals
and the colour. In fact, the flower on the left is N.
'Thongsook' and on the right is N. 'Lueang Thong'. These
two cultivars were produced by Dr. Slearmlarp Wasuwat who selected
them from open-pollinated hybrids of N. 'Trail Blazer'
in 1988 and introduced them in 1992.
I cannot tell the difference from the flowers. These two cultivars
are medium sized waterlilies which need water depth of 0.30-0.60
m (12-24") and their diameter is 0.45 m (18") and larger.
They need at least four hours a day of sunlight. I must find
the key to tell the different between the two of them with my
eyes. The clues follow: