Platanus x hispanica (Harding, 2024a)
Leaf of Platanus x hispanica (Golik, 2022)

London Plane

Platanus x hispanica Mill. ex Münchh

London Plane

Platanus x hispanica Mill. ex Münchh

“…has been shown to be an efficient air purifier in cities.” – Economic and Ethnobotanical Uses
Platanus x hispanica (Harding, 2024a) Platanus x hispanica (Harding, 2024a) Green graphic of leaf.
Picture of a distant London Plane with a park lamp.

Summary

Tree

London plane is a tree that is a hybrid between American sycamore (Platanus occidentalis) and Oriental planetree (Platanus orientalis).

Bark

Bark that is smooth and brown and sheds to reveal yellow-green inner bark.

Leaves

Leaves are 5-9 in (12-23 cm), alternate, and palmately veined with 3-5 moderately shallow, pointed lobes (they look similar to a maple leaf); leaf margins are sparsely toothed.

Flowers

Flowers are at most ½ in (1 cm) wide and red to yellow-green. They occur in round clusters.

Fruit

Fruit is a dense, spherical cluster, tan when ripe, and occur two per stalk (Kershner, 2008).

Taxonomy

(How things are grouped and categorized based on shared traits.)
  • Kingdom: Plantae
  • -Phylum: Streptophyta
  • –Class: Equisetopsida
  • —Subclass: Magnoliidae
  • —-Order: Proteales
  • —–Family: Platanaceae
  • ——Genus: Platanus
  • ——-Species: x hispanica
Leaves of Platanus x hispanica (Harding, 2024b)
Leaves of Platanus x hispanica (Harding, 2024b)

Taxonomic History:

Platanus x hispanica may also be referred to as Platanus x acerifolia or Platanus x hybrida (Hull, 2009). The name P. x hispanica can be traced back to Phillip Miller and Otto von Münchhausen in the 18th century (Münchhausen, 1765). It was called P. x acerifolia by Carl Lundwig von Willdenow (Linnaeus, 1797) after being known as P. orientalis var. acerifolia, as a variety of one of the parent species (Aiton, 1789).

Leaf of Platanus x hispanica (Golik, 2022)
Leaf of Platanus x hispanica (Golik, 2022)
Leaf of Platanus occidentalis (Alexander, 2012)
Leaf of Platanus occidentalis (Alexander, 2012)
Green graphic of leaf.

Identification Tips

It is very difficult to distinguish between Platanus x hispanica and its parent plant Platanus occidentalis, and some botanists do not agree that they are distinct entities (Welsh, 2003). The lobes of Platanus x hispanica’s leaves are longer than P. occidentalis’, and it has two fruits per stalk. Its bark has more green to it (Kaul, 2020). Platanus occidentalis also has shallower lobes (Kershner, 2008).

Fun Fact icon

Fun Fact!

London planetree’s assumed parent species, Platanus occidentalis and Platanus orientalis, come from different sides of the world. Platanus occidentalis, the American sycamore, was brought over to Europe by New World explorers, while P. orientalis, the Oriental plane, is native to southeastern Europe. The two species probably crossbred in the Vauxhall garden, which is where the hybrid was discovered by John Tradescant the Younger in the 1600’s (Venables, 2015).

Native Range:

State level distribution map for Platanus x hispanica in the United States. It also occurs in other parts of the world (USDA, 2024)
Blue color indicates introduction of hybrid to the area. State level distribution map for Platanus x hispanica in the United States. It also occurs in other parts of the world (USDA, 2024)
Green color indicator for native range

Native

Purple color indicator for introduced range

Introduced

Blue color indicates introduction of hybrid to the area. State level distribution map for Platanus x hispanica in the United States. It also occurs in other parts of the world (USDA, 2024)

Plant Ecology/Habitat

London Plane is known for being a vigorous grower (Henry & Flood, 1919). It can tolerate environmental stressors such as pollution with minimal damage (Dineva, 2004), and sheds its bark to free itself of accumulated pollutants and disease carriers (MSPC, 2021). This tree does better with warm summers. Cooler conditions in the summer can make it more susceptible to the widespread tree disease anthracnose, which is caused by a microscopic fungus called Apiognomonia veneta (Ivanová, 2007).

Green graphic of leaf.

Economic or Ethnobotanical Uses

  • London planetree is commonly planted in urban areas throughout Europe, the Americas, and even Africa and Australia. It is very tolerant of air pollution (Hull, 2009) and has been shown to be an efficient air purifier in cities (Selmi, 2016).
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Fruits of Platanus x hispanica (Hladac, 2019)
Fruits of Platanus x hispanica (Hladac, 2019)
Green graphic of leaf.

Conservation Status

This is a cultivated species and thus does not have a status rank (NatureServe, 2024).

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