Back From The Brink – A Conservation Success Pyg Nymphaea Thermarum


NYMPHAEACEAE, Nymphaea thermarum, 2010535, Bonn, Rwanda

NYMPHAEACEAE, Nymphaea thermarum, 2010535, Bonn, Rwanda

Naturally, as I’ve just installed a pond I have been researching plants to furnish it. In doing so I came across an interesting conservation success. Pyg Nymphaea Thermarum  is the smallest water lily in the world and the rarest. In fact in the wild it is now extinct. Its pads, or leaves, measure only about 1cm across, which is less than 10% of the next smallest species in the genus. It came from Rwanda, where it grew in thermal spring water that cooled to about 25 degrees. The thermal spring was over-used by farmers and in 2008 it dried up. As this was the ONLY place where this lily grew, it eventually, tragically died off. German botanist Eberhard Fische, seeing the p[ant was in trouble sent some plants to Bonn Botanic Gardens. However, they could not persuade seeds to germinate and the plant’s existence hung in the balance. Carlos Magdalena, at Kew, only discovered the solution when down to the last twenty seeds in the whole world AND one of the two remaining plants had been eaten by a rat. It turns out that most of this genus germinate in deep water, but Pyg needs co2 to germinate, and once that had been discovered, eight healthy plants were raised from seed. This little survivor now has the potential to become a houseplant! Back from the brink, this is one conservation success! I still haven’t chosen a water lily or stocked my pond with plants. That will happen this weekend, when I make a special trip to a large water garden centre I’ve had recommended to me, but I’ve had an interesting time reading!

Photo from the Kew website.

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