They appertain in consequence to a single species, and the gymnosporangium ceased to be an independent species, and must be considered as synonymous with the first generation of Roestelia.
"Fungi: Their Nature and Uses"
Mordecai Cubitt Cooke
There is no doubt that in next spring it will result in gymnosporangium."
"Fungi: Their Nature and Uses"
Mordecai Cubitt Cooke
Peridermium Pini and Aecidium elatinum also cause cankers under certain conditions, as also does gymnosporangium, but in these cases the fungi are more truly parasitic.
"Disease in Plants"
H. Marshall Ward