Charles Morren (1807-1855) was a prolific publisher on botany, palaeontology and other fields. He was director of the Botanical Gardens in Liege, but is especially remembered for his discovery on how to fertilize exported vanilla plants. He published this nowadays extremely hard to find botanical journal, of which this is a rare complete set. Some spotting, mostly in the text and the uncoloured plates. Small library stamps on first half titles. A good and rare set in an attractive binding, with beautifully hand-coloured plates. Neither in Nissen BBI, nor in the serial catalogue of the BM(NH).