This sub-genus is the source of the regal pelargoniums. The main parent is thought to be the species Pelargonium cucullatum, with contributions from several other species including: P. angulosum, dark purple with darker streaks (introduced 1724); and P. grandi/lorum, white with red streaks (introduced 1794).
In addition to zonal and regal pelargoniums there are several other groups, the main ones being ivyleaved pelargoniums, scented-leaved, decorative foliage varieties, uniques and miniatures. You could easily fill a greenhouse with a small selection of the many varieties available, but if your purpose is to grow plants to furnish the house throughout the year it is necessary to show restraint and select the groups which will serve this purpose best. The two main groups, which are the zonals and regals, are therefore the obvious choice.
