Pelargonium

From Academic Kids

Geraniums
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Tzk.jpg



Common pink garden geranium
Scientific classification
Kingdom:Plantae
Division:Magnoliophyta
Class:Magnoliopsida
Order:Geraniales
Family:Geraniaceae
Genus:Pelargonium
Species

about 200

Missing image
Pelargon.jpg
Pelargonium x hortorum

Pelargonium is a genus of flowering plants that includes about 200 species of perennial, succulent, and shrub plants, commonly but incorrectly known and even sold as geraniums. Confusingly, Geranium is the correct botanical name of the separate genus that contains the related Cranesbills. Both genera are in the family Geraniaceae. Linnaeus originally included all the species in one genus Geranium, but they were later separated into two genera by Charles LHritier in 1789. Gardeners sometimes refer to the members of genus Pelargonium as "pelargoniums" in order to avoid the confusion, but the older common name is still in regular use.

Most species of geranium (Pelargonium) are subtropical or tropical and do not tolerate more than very light frosts. Geraniums are extremely popular garden plants, and hundreds of cultivars have been developed from about 20 of the species.

Geranium leaves are usually alternate, and palmately lobed or pinnate, often on long stacks, and sometimes with light or dark patterns. The erect stems bear five-petaled flowers in umbel-like clusters called pseudoumbels. The shapes of the flowers have been bred to a variety ranging star-shaped to funnel-shaped, and colors include white, pink, red, orange-red, fuchsia and an almost black variety which is quite rare.

Horticultural pelargoniums (as opposed to botanical, the wild 'species') fall into six major groups, with zonals subdivided further:

  • Angel
  • Ivy-leaved = hanging
  • Regal (or Royal) = French = Martha Washington = Violet
  • Shrubby-leaved
  • Unique
  • Zonal - erect and bushy
    • Cactus-flowered
    • Deacon (mostly dwarfs, cfr infra)
    • Double-flowered
    • Fancy-leaved
    • Formosum hybrid
    • Rosebud
    • (?) Tulip-flowered
    • Single-flowered
    • Stellar
    • Straight Zonals
      • Americana
      • Ecclipse
    • It is also usual to classify small Zonals alternatively by size or odorous excellence :
      • Dwarfs (small)
      • Miniatures (even smaller)
      • Parfum-leaved

The first species of Pelargonium known to be cultivated was Pelargonium triste, a native of South Africa. It was probably brought to the botanical garden in Leiden before 1600 on ships that stopped at the Cape of Good Hope. In 1631, the English gardener John Tradescant bought seeds from Rene Morin in Paris and introduced the plant to England. The name Pelargonium was introduced by Johannes Burman in 1738.

References & External links

  • Maria Lis-Balchin, ed., Geranium and Pelargonium: History of Nomenclature, Usage and Cultivation. (Taylor and Francis, 2002) ISBN 0415284872
  • [1] (http://www.fuchsia.be) - explanations in the on-line catalog of a Belgian breader with over 1000 varieties of Pelargonium, most also illustrated, dozens of new ones a year addedde:Geranium

ja:テンジクアオイ属 fr:Plargonium nl:Geranium zh:天竺葵

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