I grow Pelargonium x 'Attar of Roses'. It is one of the 'scented geraniums', However 'scented geraniums' are actually in the genus Pelargonium, as are all the 'geranium' pictured on this thread so far.Geranium Attar of Roses circa 1774 is named for "essence of rose".
Pelargonium x 'Attar of Roses' is likely a hybrid of P. capitatum and P. graveolens. It is one of the cultivars used in perfumery as a source of Rose Geranium essential oil. This oil is very important for perfumery and aromatherapy, as it is an affordable source of rose fragrance.
True attar of rose, or rose essential oil is too expensive for most applications.