Some may be 700-5000 years old

• Curious plant of arid regions of southwestern Africa having a yard-high and yard-wide trunk like a turnip with a deep taproot and two large persistent woody straplike leaves growing from the base
• Living relic of a flora long disappeared

Wiktionary Word definitions in Wiktionary
n. The sole plant in the genus (taxlink Welwitschia genus noshow=1).

WordNet Word definitions in WordNet
n. curious plant of arid regions of southwestern Africa having a yard-high and yard-wide trunk like a turnip with a deep taproot and two large persistent woody straplike leaves growing from the base; living relic of a flora long disappeared; some may be ...

Wikipedia Word definitions in Wikipedia
Welwitschia is a monotypic gymnosperm genus , comprising solely the distinctive Welwitschia mirabilis . The plant is commonly known simply as welwitschia in English, but the name tree tumbo is also used. It is called kharos or khurub in Nama , tweeblaarkanniedood ...

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Welwitschia \Wel*witsch"i*a\, n. [NL. So named after the discoverer, Dr. Friedrich Welwitsch.] (Bot.) An African plant ( Welwitschia mirabilis ) belonging to the order Gnetace[ae] . It consists of a short, woody, topshaped stem, and never more than two ...