In the area containing "Cycadetum" there are certain species of cicadi that have a notable history. Of these we have "Cycas revoluta", donated by Queen Maria Carolina in 1793, was the first such specimen to find a permanent home in Europe. In the following stage of the gardens' development Zamiaceae "Ceratozamia mexicana" and "Dioon edule", were both introduced from Mexico, as was "Cycas circinalis", an elegant species from the Indian sub-continent. In 1997 the collection was further improved by the acquisition of a variety of worthy specimens, including "Dioon spinulosum, Encephalartos altensteinii, Encephalartos longifolius, Encephalartos villosus, Macrozamia moorei" and "Zamia furfuracea".