Journal of Horticulture n.s. 1(6): 105 (May 7, 1861)

Mangles' Geranium
D. Brown

We have often said that Mangles' Variegated Geranium and its prototype would not cross with any other Geranium in cultivation—at least not in our climate. We believe the botanical name of Mangles' is Pelargonium heterogamum. The way to grow it and the like of it is to plant it in the richest compost out of doors, and in a climate like that of Algiers, and to sow successions or generations of self seeds of it till some of the seedlings begin to "run" or vary naturally. That was the way all the old English florists' flowers were obtained and improved before crossing was known in practice.