page_title: Pelargonium
section_title: Cultivars
hierarchical_section_title: Pelargonium / Cultivation / Cultivars
caption_attribution_description: English: Pelargonium zonale (L.) L'Her. (Geraniaceae), common name Horseshoe geranium. Botanical Gardens Ljubljana, Slovenia. Stacked image. This photograph was taken with a Panasonic Lumix DMC-G85/G80
context_page_description: Pelargonium is a genus of flowering plants which includes about 280 species of perennials, succulents, and shrubs, commonly known as geraniums, pelargoniums, or storksbills. Geranium is also the botanical name and common name of a separate genus of related plants, also known as cranesbills. Both genera belong to the family Geraniaceae. Carl Linnaeus originally included all the species in one genus, Geranium, and they were later separated into two genera by Charles Louis L'Héritier de Brutelle in 1789.
  Pelargonium species are evergreen perennials indigenous to temperate and tropical regions of the world, with many species in southern Africa. They are drought and heat tolerant, but can tolerate only minor frosts. Some species are extremely popular garden plants, grown as houseplants and bedding plants in temperate regions. They have a long flowering period, with flowers mostly in purple, red and orange, or white.
context_section_description: There was little attempt at any rational grouping of Pelargonium cultivars, the growing of which was revived in the mid-twentieth century, and the origins of many if not most were lost in obscurity. In 1916 the American botanist Liberty Hyde Bailey (1858–1954) introduced two new terms for zonal and regal pelargoniums. Those pelargoniums which were largely derived from P. zonale he referred to as P. × hortorum (i.e. from the garden), while those from P. cucullatum he named P. × domesticum (i.e. from the home). In the late 1950s a list (the Spalding List) was produced in the United States, based on nursery listings and the 1897 list of Henri Dauthenay. It described seven groups, listing each cultivar with the list of its originator, and in most cases a date. These were Species, Zonals, Variegated-Leaved, Domesticum (Regals), Ivy-Leaved, Scented-Leaved and Old. In the 1970s the British Pelargonium and Geranium Society produced a checklist and the Australian Geranium Society started to produce a register but it was not completed till its author, Jean Llewellyn's death in 1999. None of these were published. The most complete list in its time was the 2001 compilation by The Geraniaceae Group, which included all cultivars up to 1959.
  Registration of cultivars is the responsibility of the Pelargonium & Geranium Society (PAGS: formed in 2009 from the British Pelargonium and Geranium Society and the British and European Geranium Society) which administers the International Register of Pelargonium Cultivars. PAGS is the International Cultivar Registration Authority (ICRA) of the International Society for Horticultural Science for pelargoniums.
  Cultivated pelargoniums are commonly divided into six groups in addition to species pelargoniums and primary hybrids. The following list is ordered by position in the PAGS classification. Abbreviations indicate Royal Horticultural Society usage.
  A. Zonal (Z)
  B. Ivy-leaved (I)
  C. Regal (R)
  D. Angel (A)
  E. Unique (U)
  F. Scented-leaved (Sc)
  G. Species
  H. Primary hybrids
  Of these, A, U and Sc groups are sometimes lumped together as Species Derived (Sppd). This term implies that they are closely related to a species from which they were derived, and do not fit into the R, I or Z groups.
  In addition to the primary groups, additional descriptors are used. The Royal Horticultural Society has created description codes. These include;
  Cactus (Ca)
  Coloured foliage (C)
  Decorative (Dec)
  Double (d)
  Dwarf (Dw)
  Dwarf Ivy-leaved (Dwl)
  Frutetorum (Fr)
  Miniature (Min)
  Miniature Ivy-leaved (MinI)
  Stellar (St)
  Tulip (T)
  Variegated (v)
  These may then be combined to form the code, e.g. Pelargonium 'Chelsea Gem' (Z/d/v), indicating Zonal Double with variegated foliage. Crosses between groups are indicated with an ×, e.g. Pelargonium 'Hindoo' (R × U), indicating a Regal × Unique cross.
caption: Zonal pelargonium
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