Emerald botanical jewels emerge in Bristol

Turquoise jade vine flowers have appeared for the first time in the tropical glasshouse at the University of Bristol Botanic Garden.

The jade vine (Strongylodon macrobotrys) is a member of the same family as peas and beans and can grow up to 100 metres in length in its native Philippines.  Its flower spikes or racemes have been designed by nature to be pollinated by bats.  The bat hangs upside down to drink nectar from the cup-shaped jade vine flower. At the same time, the flower deposits pollen on the back of the bat's head which it then carries off to pollinate the next flower.

Both the vine's natural habitat and pollinators are under threat in their native Philippines due to deforestation. The unusual characteristic flower coloration has been shown to be an example of copigmentation, a result of the presence of the chemicals malvin and saponarin.

The Botanic Garden sowed the seed obtained from the University of Cambridge Botanic Garden seven years ago. There are only a few gardens in the UK which have the jade vine, including Kew Gardens, the Botanic Gardens at the universities of Oxford and Cambridge and the Eden Project.

Nick Wray, Curator of the Botanic Garden, said: "The flowering of the jade vine after seven years of care is a horticultural triumph. This plant is unique in the West Country and this is the very first time that the plant has flowered here.

"It is only grown at six other gardens in the UK and this is a first for us. Its flower colour is exceptionally rare in plants and it is not fully understood the role of the colour as its pollinating bats use echolocation to find their food.  Visitors to the garden are in for a treat, as it is very rare to see the vine in flower in this country."