Radarchart of mean values of the morphological investigations of teliospore characteristics of Ravenelia macowaniana originated from Vachellia karroo (red), V. natalitia (green) and R. xanthophloeae on V. xanthophloea (blue). Numbers on y-axis represent the respective minimum and maximum values. This radarchart reveals the morphological differences between R. macowaniana and R. xanthophloeae.