Classroom lesson ยท Welwitschia ยท ๐Ÿ‡ณ๐Ÿ‡ฆ Namibia

Welwitschia

A plant that can live for more than 1,000 years in the desert

Photo ยท Wikimedia Commons

What is it?

The Welwitschia is one of the strangest and most extraordinary plants on Earth. It grows only in the Namib Desert of Namibia and Angola, and it can live for more than 1,000 years โ€” making some individual plants older than the oldest trees in Europe. Despite growing for a thousand years, it only ever has two leaves.

Tell me more

The Welwitschia looks like a mess of shredded leaves spread across the ground, but those long ribbons are actually just two leaves that have been growing and splitting for hundreds of years. Over time wind, heat and time tear the leaves into strips, so an old plant can look like it has dozens of leaves when really there are only two, growing from a short woody stem in the middle.

The plant collects water through its leaves by absorbing the coastal fog that rolls in from the Atlantic Ocean. This is its main source of water, because rain in the Namib can be very rare. The leaves are specially designed with many tiny pores that catch fog droplets, making the Welwitschia perfectly adapted to one of the driest places on Earth.

Scientists have measured some Welwitschia plants and estimated them to be around 1,500 years old using a technique called carbon dating. That means some plants alive today were already growing when the Vikings were sailing across the Atlantic Ocean. It is one of the longest-living organisms on the planet.

The Welwitschia is so special and unique that it has its own scientific family all by itself โ€” there is nothing else quite like it anywhere in the plant kingdom. It is Namibia's national plant and appears on the country's coat of arms. Namibians are very proud of this extraordinary living fossil.

In the classroom

Walk your class through this in 15 minutes.

Talk together

Discussion prompts

  1. 01A Welwitschia lives for over 1,000 years but only has two leaves. What is the most surprising thing about this plant to you?
  2. 02The plant collects fog to drink. How is that similar to or different from how you get your water each day?
  3. 03If a plant has been growing since before the year 1000 AD, what historical events would it have 'witnessed' (been alive during)?
Try this

Classroom activity

Draw a timeline starting at the year 500 AD and ending at today. Mark when a 1,500-year-old Welwitschia would have started growing. Then add at least five famous historical events along the timeline to show what was happening in the world while the plant was quietly growing in the desert.