Crown jewels of Hortus Leiden
According to the Leiden Botanical Garden, these are the 'crown jewels': the Giant water lily (Victoria amazonica), which flowers almost weekly in a good summer, the pitcher plant (Nepenthes), with adhesive edge so that insects never come out again, and the Jade flower with its beautiful azure blue color, which blooms in April-May. In nature, the Jade flowers are pollinated by bats: they hang upside down from the clusters and drink the nectar. Fun for children: with biologist Ed on an expedition through the tropical greenhouses.