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Platanus racemosa

From Wikipedia, the free encyclopedia

Platanus racemosa
Bare Platanus racemosa.jpg
Scientific classification e
Kingdom: Plantae
Clade: Angiosperms
Clade: Eudicots
Order: Proteales
Family: Platanaceae
Genus: Platanus
Species: P. racemosa
Binomial name
Platanus racemosa
Nutt.
Platanus racemosa range map.jpg
Natural range

Platanus racemosa is a species of plane tree known by several common names, including California sycamore, western sycamore, California plane tree, and in North American Spanish aliso. Platanus racemosa is native to California and Baja California, where it grows in riparian areas, canyons, floodplains, at springs and seeps, and along streams and rivers in several types of habitats. It has been found as far north as Tehama and Humboldt counties.

Description

This large tree grows to 35 metres (110 ft) in height with a trunk diameter of up to one meter (three feet). A specimen on the campus of Stanford University has a trunk girth (circumference) of 10.5 feet (3.20 m).[1] The trunk generally divides into two or more large trunks splitting into many branches. The bark is an attractive patchwork of white, tawny beige, pinkish gray, and pale brown, with older bark becoming darker and peeling away. Platanus racemosa is the dominant species in the globally and state endangered sycamore-alluvial woodland habitat.

The large palmately lobed leaves may be up to 25 centimetres (9.8 in) centimeters wide and have three or five pointed lobes. New leaves are a bright translucent green and somewhat woolly. The deciduous tree drops copious amounts of dry golden to orangish red leaves in the fall. The inflorescence is made up of a few spherical flower heads each around a centimeter wide. The female flower heads develop into spherical fruit clusters each made up of many hairy, maroon-red-woolly achenes.

The tough and coarse-grained wood is difficult to split and work. It has various uses, including acting as a meat preparation block for butchers. Many small birds feed on its fruit, and several mammals eat its twigs and bark. The pollen and the hairs on leaves and flowers can be allergens for some people.[2] New leaves are susceptible to anthracnose canker, which, when it causes a side bud to become the new leader, can create picturesque angling trunks and branches on older specimens.[2]

Cultivation

It is also widely planted horticulturally as a landscape tree in public landscapes and private gardens. New appreciation for how it shades sun in summer and lets sun through in winter has led to its use in green architecture and sustainable design. The aesthetics of its bark and its overall form add interest.

 Platanus racemosa leaves and achenes
Platanus racemosa leaves and achenes

References

External links

This page was last edited on 3 May 2018, at 21:55.
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