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Sterculia murex

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Sterculia murex
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Rosids
Order: Malvales
Family: Malvaceae
Genus: Sterculia
Species: S. murex
Binomial name
Sterculia murex
William Hemsley

Sterculia murex Hemsl. or Lowveld Chestnut is a South African tree with a very limited distribution in the Transvaal Lowveld, occurring only in eastern Mpumalanga and Swaziland. Kew currently recognises some 92 species of Sterculia, confined to the tropics and slightly beyond at low altitudes.

First described by the botanist William Botting Hemsley in 1894, this species grows to about 10 metres in height with a trunk of some 30 cm in diameter covered in thick, greyish-brown bark, becoming almost black with age, and cracking in a rectangular pattern. Its unusual spiny fruits and palmately compound leaves make this an easily identifiable tree. It was illustrated by Cythna Letty in Flowering Plants of South Africa, vol. 32, plate no. 1279. After Sterculia alexandri it is the most southern representative of the genus in Africa.

Five carpels are joined, forming the spokes of a wheel some 30 cm in diameter. They are woody and densely studded with hard, blunt spines, dehiscing on one side to reveal large (25 mm long), black seeds, which are rich in oil and, after roasting, are a valuable food source. Stinging hairs, common in the Malvaceae, coat the interior of the carpels and these may irritate skin and eyes. The carpels have a superficial resemblance to the Northern Hemisphere Chestnut.

Gallery

  • Plate 2278 from Icones plantarum
    Plate 2278 from Icones plantarum
  • New leaves
    New leaves
  • Bark
    Bark

References

  1. http://www.theplantlist.org/tpl1.1/search?q=Sterculia+
  2. http://plants.jstor.org/visual/preart0000302?s=t
  3. Icones plantarum vol. 23:(1894)

External links

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