Prickly Castor Oil Trees

Welcome to our prickly castor tree pictures page.

On this page you will find lots of nice pictures of prickly castor trees.

You will also find a lot of wonderful information on prickly castor trees, including information about the prickly castor tree species, planting information, and much more.

This is valuable and useful information that can help you to learn more about the prickly castor tree.

Prickly Castor Oil Tree Photos

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Prickly Castor Oil Tree Pictures

castor bean
prickly castor
castor oil plant
prickly castor leaves

Prickly Castor Oil Tree Facts

Here is some general information on the prickly castor tree.

Kalopanax septemlobus, common name Kalopanax or Prickly Castor-oil Tree, is a deciduous tree in the family Araliaceae, the sole species in the genus Kalopanax. It is native to northeastern Asia, from Sakhalin and Japan west to southwestern China.

It grows to 30 m tall, with a trunk up to 1 to 1.5 m diameter. The stems are often spiny, with stout spines up to 1 cm long. The leaves are alternate, in appearance similar to a large Fatsia or sweetgum leaf, 15 to 35 cm across, palmately lobed with five or seven lobes, each lobe with a finely toothed margin.

The leaf lobes vary greatly in shape, from shallow lobes to cut nearly to the leaf base. Trees with deeply lobed leaves were formerly distinguished as K. septemlobus var. maximowiczii, but the variation is continuous and not correlated with geography, so it is no longer regarded as distinct.

The flowers are produced in late summer in large umbels 20 to 50 cm across at the apex of a stem, each flower with 4 to 5 small white petals. The fruit is a small black drupe containing 2 seeds.

It is cultivated as an ornamental tree for the 'tropical' appearance of its large palmate leaves in Europe and North America; despite its tropical looks, it is very hardy, tolerating temperatures down to at least minus 40 degrees celsius. The plant grows very quickly at first, however slowing in growth rate when reaching around 40 years old.


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