Cryptocoryne nurii Pahang

I’ve had this plant flower before, but in the three more recent times its bloomed, I noticed that even though overall the spathe was getting larger as the plant got larger, the tube was actually getting shorter, and it was the kettle that was getting taller. Last week, two spathes opened up at the same time showing the following:

cryptocoryne nurii pahang

Notice how tall the kettle is.
cryptocoryne_nurii_pahang_2

A cross section of the spathe shows the tube is almost non-existent, a very long spadix and well developed male and female flowers.
cryptocoryne_nurii_pahang_3