Bihrmann’s caudiciforms: Adenia spinosa. http://www.bihrmann.com/caudiciforms/subs/ade-spi-sub.asp Accessed on 2018/03/25.
http://pza.sanbi.org/references/bihrmann’s-caudiciforms-adenia-spinosa-httpwwwbihrmanncomcaudiciformssubsade-spi-subasp