Pelargonium fragrans is not a recognised Pelargonium species, but a horticulturally developed cultivar, common in South African and other gardens. Cultivar means that specimens had been selected from the wild or in cultivation for growing plants with desirable characteristics and maintained in stable form by propagation to warrant a marketable identity.
There may be patent and thus property rights associated with cultivars, underpinned by varying legislation relating to plant breeding in many countries, including South Africa. Cultigens differ from cultivars; this study field is large, pioneered by Liberty Hyde Bailey in the first half of the 20th century.
The species used to evolve Pelargonium fragrans was Pelargonium coronopifolium. The proper full name of the cultivar should probably be P. coronopifolium subsp. angustissimum "fragrans". The original P. coronopifolium has magenta flowers. It grows in the Cederberg and Gifberg area (Wikipedia; Bond and Goldblatt, 1984).