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28 November 2019 | Story Leonie Bolleurs
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Dr Sandy-Lynn Steenhuisen and Ruth Cozien at a spot high up in the Maloti-Drakensberg World Heritage Site, close to Sentinel Peak, photographing a Drakensberg crag lizard underneath the leaves of the ‘Hidden Flower’.

Flowers high up in the Maloti-Drakensberg World Heritage Site made world news when it was discovered that the Drakensberg Crag Lizard is their sole pollinator. 

This first for continental Africa – a plant being pollinated by a lizard – is a discovery by a research group including Dr Sandy-Lynn Steenhuisen, Senior Lecturer in the Department of Plant Sciences and affiliate of the Afromontane Research Unit (ARU) at the Qwaqwa Campus of the University of the Free State (UFS), in collaboration with Dr Timo van der Niet, Prof Steven Johnson, and project leader Ruth Cozien, all from the Pollination Ecology Research Laboratory and Centre for Functional Biodiversity at the University of KwaZulu-Natal.

Besides their work being published in popular news here in South Africa (including an isiZulu article), it has also received coverage in, among others, Belgium, Canada, the Netherlands, and the United States of America. 

Is it a bee, a bird, perhaps a mouse?

‘Hidden Flower’, true to its name, is a plant species with flowers hidden at ground level, underneath the leaves of the plant. Like the leaves, the flowers are also green. With the flowers filled with nectar (up to 1 ml per plant) and strongly scented, one concludes that, just as with other flowers, these flowers must be visited by a pollinator. Is it a bee, is it a bird, perhaps a mouse/non-flying mammal?

According to Dr Steenhuisen, who was brought into the project because of her experience with rodents pollinating proteas, many plants are adapted to attract and be pollinated by a specific animal. They attract their pollinators using particular scents and colours and reward them for their service with, for example, nectar, oil, fragrance, and sometimes even shelter. 

The ‘Hidden Flower’ initially had the group of researchers thinking that it was being pollinated by a non-flying mammal. “Everything about the plant made it look like it should be mammal-pollinated,” Dr Steenhuisen said. 

They investigated all options, using several techniques to assess the contribution of different possible animals to set seed. To further assist them in their quest to find the true pollinator, the team put up motion cameras that recorded activity in the area of the ‘Hidden Flower’. 

Great was their surprise when studying the video material after a week of fieldwork in the mountains, finding shy lizards dipping their snouts in the ‘Hidden Flower’ and lapping up the nectar.

Dr Steenhuisen described this discovery as completely bizarre, exciting, and fascinating. 

To make 100% sure that lizards are pollinating the ‘Hidden Flower’, these animals were excluded from the plants. Results published in a paper in Ecology showed that when the lizards were experimentally excluded from the plants, the number of seeds produced dropped dramatically by almost 95%. This finding helped to further prove their discovery. 

Strong scent and bright orange colour attract

The team researched the new phenomenon and found that although flower visitation by lizards is not unknown, it occurs almost exclusively on oceanic islands. Cozien says one should keep in mind that mountains are like sky islands and might therefore have similarities with oceanic islands in terms of their ecology.

The strong scent and the touch of orange at the base of the inside of the flowers is believed to play an important role in attracting lizards. The little lizard may recognise the spots of orange inside the flowers which resemble the orange colour of a male lizard in mating season, attracting females. Lured by the strong scent and the orange spots, the reptiles stick their snouts into the flower in search of nectar, pollinating the ‘Hidden Flower’; thus, making sure that this flower will continue to grow on the slopes of Sentinel Peak in the Maloti Drakensberg range. 

This research finding on lizard pollination, which reads almost like a fairy tale with its islands, hidden flowers, nectar from the gods, and little dragons, shows that there are still many unknown and surprising interactions that need to be discovered and conserved to ensure a healthy ecological system. 

The research findings of this study were published in April 2019. 

News Archive

Professor awarded by Cardiff University for exceptional teaching and research record
2015-10-20

Prof Pieter Duvenage
Cardiff University is one of the best research universities in the United Kingdom (UK) and the world. In 2014, Cardiff was ranked number 2 and 5 among UK universities in the Research Excellence Framework for impact and quality, respectively.

Annually, Cardiff selects and recruits the most outstanding teachers and researchers from across the globe. This year, this institution bestowed on Professor Pieter Duvenage the title of Honorary Professorship in Political Philosophy for his contribution and commitment to philosophical research in South Africa and internationally. Prof Duvenage is Head of the Department of Philosophy at the University of the Free State (UFS).

Prof Duvenage has authored and co-authored four books, publishing almost 40 accredited articles in journals and books. As a distinguished scholar, he displays immense dedication to the investigation of the political implications of intellectual traditions.

Since 1997, Prof Duvenage has been lecturing philosophy as an associate professor, full professor, or visiting professor at various South African and Australian universities. He was appointed as Head of the Department of Philosophy in 2011, where he continues to explore his interests in Phenomenology, Critical Theory, and South African Intellectual History.

His rich academic history had earned him the prestigious five-year Honorary Professorship at Cardiff’s Department of Politics.  In 2014, the same university invited Prof Duvenage to be a Professorial Fellow of the Collingwood and British Idealism Centre for an indefinite period.

Professor David Boucher, Director of the Collingwood and British Idealism Centre, has played a crucial role in initiating both processes. According to Prof Duvenage, “Professor Boucher is a respected British academic and a Distinguished Visiting Professor at the University of Johannesburg.”

When Boucher announced the good news, Prof Duvenage was very surprised. “The appointment came as a total surprise. I never studied there [at Cardiff University], therefore it was purely through academic networks.”

Considering Cardiff’s reputation and Prof Duvenage’s exceptional skill sets and values, his relationship with the world-leading university in research is bound to blossom.

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