Dwarf, slow growing plants that rarely exceed 20 cm tall, with small leaves, short-noded stems and compact growth. This group has been known for about 200 years but has only been produced commercially in the 20th century. So-called dwarf zonals are sometimes combined with this group.
Source: (2002). Pelargonium. In: . Horticultural Flora of South-eastern Australia. Volume 4. Flowering plants. Dicotyledons. Part 3. The identification of garden and cultivated plants. University of New South Wales Press.