Sterculia africana

Ticks growing on trees!

I devoted my scientific life to study ticks in Africa. For this reason, Sterculia africana, the Tick tree or African star-chestnut caught my interest during our recent trip to Zambia.

We had seen this tree at Kariba, Zimbabwe and collected some “ticks” from it. I somehow remember the sight of the tree and driving from lake Kariba to Lusaka I stopped to have a look and managed to collect some of its interesting fruits. Unfortunately, grass burning had taken place and it was difficult to find the nicest seeds (ticks).

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Three fruits of the Tick tree.

A small to medium size tree of dry areas with a smooth silver-white papery bark, it produces bunches of yellowish flowers marked with reddish lines. The fruits are boat shaped of up to 140mm long with tapering ends of a golden velvety appearance. They are loaded with blue-grey seeds that, amazingly, resemble engorged female ticks.

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Two “ticks” collected from the ground and placed inside the dry fruits.

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The fruits and “ticks” with a match for a scale.

The “ticks” are attached among hairs which, I forgot, are extremely thin but able to embed easily in the skin. Once lodged, they are very irritating as I learnt (again) this time. Luckily, I managed to remove them and was able to use my fingers (again) to write this post.

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A close up to show the nasty hairs.