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Pyrenacantha malvifolia

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Started out as a approximately two year seedling,
10 centimetres in diameter. 13 Years later, and it reach 50 centimetres, and I try to restrain it.

This is a rather fast growing caudiciform. Seven years later; 25 centimetres.

Nine years, 30 centimetres in diameter and 26 branches, some with clusters of  mixed flowers. I wonder how it would have looked, if I didn't cut it back  to base every winter? Or if I had provided it with a pot, more than half the size of the caudex?

After 12 years, and it reach 50 centimetres in diameter

I made a cutting, rooted it by aeroponics, and it worked.

One year old cutting. Rather thick stem. It more than doubles the diameter the following year.

This two year old cutting got heaps of mainly male flowers, sitting in 4-7 centimetres long inflorescences.

Later, the male flowers developed.

At the base of the long male inflorescences, the unisexual flowers can be found.

Seen quite a few like this, not really sure what it is.

This time, I actually got seeds in the fruits.

A young seedling from own stock.

Author:  Heinrich Gustav Adolf Engler, 1893
Origin:  Ethiopia, Kenya, Somalia, Tanzania
Soil:  Mix - Rich
Water:  Medium - Maximum
Sun:  Maximum
Thickness:  1,5 Meter
Height:  15 Meters
Flower:  Small! Green
Propagate:  Seeds/Cuttings
Names:  Monkey Chair.
Synonyms:  Trematosperma cordatum, Urban, 1883.
Pyrenacantha globosa, Engl.
Pyrenacantha ruspolii, Engl.

This member of the Icacinaceae family was given this name by Heinrich Gustav Adolf Engler in 1893. It is found in Somalia, Ethiopia, Kenya and Tanzania, growing in fine grit on hill-sides with little water and lots of sun. Never the less, it thrive with quite a lot of water and a rather rich soil. The caudex can grow to one and a half meter in diameter! The vines can grow to 15 meters. My plant add significantly to the caudex, but only in the late summer and autumn. Although I keep it dark and dry, it starts growing around first of March.
Where my plant break dormant mid winter, when it is stored at 22C, it remains dormant at 12-15C.

The genera name  from Greek pyren; 'a stone fruit' and Greek akanthos; 'thorn' for the peglike protuberances from the inner surface of the fruit penetrating the cotyledons. The species name means 'mallow-leaved'.

The flowers are unisexual (plants di- or monoecious) or bisexual. Bisexual flowers are usual found at the base of male flowers, the female in tiny clusters along the stems. With both sexes, the plant can self fertilize. I got seeds on a two year old cutting, which do form a perfect caudex.
The young plants form sterile fruits.

After it reached 40 centimetres in diameter, I try to stop the growth by growing it in a tiny pot, only containing less than quarter the amount of soil, compared to the caudex. That did little to stop the expansion. It still add ten centimetres to the diameter each year...

Wild plant in Ethiopia by Otto Schmidt. This is about how big it can grow - in the wild.

At first, extreme small female flowers occurs on the stems, at the base of leafstalks.

They only produce sterile fruits, when no male flowers are present.

In 2012, some new type of buds emerged:

They were sitting in clusters, but still only female flowers, which are only 0,6 millimetres across.

Male flowers on long inflorescences.

Those are just as tiny, but sits on long inflorescence, up to seven centimetres long.

These are bisexual flowers near the stem, at the base of male inflorescences.

The fruits are sitting in clusters near the stem.

Within the yellow fruits, the seeds are found, one in each fruit.

The leaf glance produces a sugary sap.