Almost everything written about this plant repeats three things: that it drinks fog through its leaves, that it lives two thousand years, and that it is pollinated by the red bug named after it. Field research contradicts all three. What is left after you strip out the folklore is stranger than the folklore was — a plant with two leaves and no relatives, growing on rain it may only see once in several years.

Two leaves, forever

Welwitschia produces exactly two strap-shaped leaves after germination and then never produces another. They grow continuously from a basal meristem, are never shed, and simply keep going — which is why an old plant looks like a heap of torn green straps rather than a plant with two of anything. The splitting and fraying is wind and time working on the same two leaves.

Fourteen years of monthly measurement on 21 plants at Gobabeb gave a mean growth of 0.37 mm a day, about 135 mm a year, but varying twenty-two-fold within the same individual. Growth quadrupled in the three years following summer rainfall events over 11 mm. The same study records an absolute maximum leaf length of over 250 cm, against a mean maximum of 85 cm.

It does not drink fog

This is the correction that matters most, because the fog story is everywhere — including on the websites of major botanical institutions. Researchers excavated seven plants on the Welwitschia Plains and found something quite different from the textbook picture.

• No functional taproot. Roots spread 1.8 to 8.9 times further sideways than down. Maximum depth 65 to 178 cm; lateral spread up to 904 cm.
• Between 63 and 99% of root length sat shallower than one metre, most of it in gypsum layers between 10 and 66 cm holding about 10% moisture.
• The isotopes point to rain, not the Atlantic. Root water carried a continental rainfall signature, not a fog one.
• 14% of root length grows upward, towards the surface — the opposite of what a fog-drinking or groundwater-tapping plant would do.

The authors’ conclusion is blunt: fog is not the principal source of water for Welwitschia. They allow a minor role — some passive uptake through stomata at dawn — but the plant is living on rain, stored in shallow gypsum and calcrete horizons that hold it long after the surface has dried. An earlier fourteen-year study reached the same place from a different direction: growth tracked rainfall, and fog did not appear to influence it at all.

How old, really

You will read 2,000 years. The Gymnosperm Database states plainly that such claims lack supporting data. The only radiocarbon work on the plant, published in 2026, examined a large male from Welwitschia Wash that died in 2021: its oldest tissue dated to 531 ± 20 radiocarbon years, putting germination somewhere around 1420 to 1440.

The study also found something counter-intuitive about how the plant grows. The oldest tissue is on the outer caudex near the stem base, and tissue gets *younger* as you move inward — the reverse of tree rings. Credible lifespan estimates sit at 500 to 1,000 years, which is remarkable enough without inflating it.

The bug is not the pollinator

The conspicuous red and black *Probergrothius* bug that swarms over Welwitschia cones is named after the plant and is credited everywhere as its pollinator. A dedicated pollination study found no evidence of any pollination function at all — the bugs carried minimal or no pollen and stayed on the leaves.

The actual pollinators are flies, principally a sarcophagid, *Wohlfahrtia pachytyli*, drawn by nectar drops the cones produce on a daily rhythm. Wind pollination is negligible: pollen traps 25 metres from male plants caught zero grains in six days, against 890 grains a day at zero metres. The pollen is sticky and it does not travel.

The genome, and why longevity is written into it

A 2021 genome paper found the mechanics behind the plant’s persistence. Welwitschia’s genome is 6.86 gigabases, more than twice the human genome, with a lineage-specific whole-genome duplication about 86 million years ago. Over half of it — 55.26% — is retrotransposons, which underwent a burst of activity in the last one to two million years and were then silenced by some of the highest CHH methylation levels recorded in any plant.

Alongside that: upregulated DNA repair genes, elevated heat-shock proteins, and eleven copies of the R2R3-MYB subfamily VIII transcription factors, where comparable plants carry no more than five. The paper describes Welwitschia’s as the longest-lived leaves in the plant kingdom, and sampled developmental stages on a single leaf separated by more than six years of growth.

Seeing one, legally

The Welwitschia Drive east of Swakopmund is the accessible population, and it is one of the few parts of the Namib-Naukluft Park where you cannot simply pay at the gate. Namibia’s environment ministry requires the permit to be obtained beforehand — from the Swakopmund office on the corner of Bismarck and Sam Nujoma, from Windhoek, or from Sesriem. Leaving the marked tracks is prohibited, and on these plains a tyre mark lasts decades.

The plant is protected under Namibian law and listed on CITES Appendix II. Its conservation status is less settled than you would expect: it has never been formally assessed globally by the IUCN — a 2021 grant was awarded specifically to produce one — though a 2020 study proposed Endangered status for the northern Namib population in the Kunene, which numbers about 1,330 plants in twelve isolated stands.

It is on the Namibian coat of arms, described there as “a fighter for survival and is therefore a symbol of our nation’s fortitude and tenacity” — which, for a plant that turns out to be living on rain it rarely gets rather than fog it was assumed to drink, is if anything an understatement. The Gymnosperm Database carries the full botanical account.

For the animals that share these plains, see the Namib’s specialist species and how desert-adapted wildlife survives. If you want the Welwitschia Drive built into a route with the permit already sorted, that is what our self-drive itineraries do.

Frequently asked questions

How old is the oldest Welwitschia?

The only radiocarbon-dated individual, a dead male from Welwitschia Wash published in 2026, had oldest tissue of 531 ± 20 years — placing its germination around 1420–1440. Credible lifespan estimates run 500 to 1,000 years. The commonly repeated 2,000-year figure has no supporting data behind it.

Does Welwitschia get its water from fog?

The evidence says no, or at least not principally. Seven plants excavated on the Welwitschia Plains had no functional taproot, roots spreading up to nine metres sideways but rarely deeper than a metre, and root water with a rainfall isotope signature rather than an Atlantic one. The researchers concluded fog is not the principal water source. Several major institutions still publish the fog version.

How many leaves does a Welwitschia have?

Two, for its entire life. They grow continuously from a basal meristem at roughly 8 to 15 cm a year, and are never shed. What looks like a tangle of many leaves is those same two, split and frayed by centuries of wind.