- Encephalartos altensteinii
- United Kingdom (Kew)
The world's oldest potted plant is a prickly cycad (Encephalartos altensteinii), which was brought from South Africa to the UK and planted in 1775. The cycad is currently on display in the Palm House, Royal Botanical Gardens, Kew, Surrey, UK . These tree-fern like Cycads are often called 'living fossils' as they are amongst the oldest surviving species of plants; it is known that they were growing over 200 million years ago during the Permian era. Cycads are dioecious meaning their male and female reproductive structures are on different plants with reproduction achieved through seeds. They typically grow to 4-7 m (13-22 ft).