World English Dictionary
welwitschia (wɛlˈwɪtʃɪə)
a gymnosperm plant, Welwitschia mirabilis, of the Namib Desert in SW Africa, consisting of two large woody leaves lying on the ground with a conelike structure arising between them: phylum Gnetophyta
[C19: named after F. M. J. Welwitsch (1807--72), Portuguese botanist, born in Austria]

Collins English Dictionary - Complete & Unabridged 10th Edition
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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 700-5000 years old 
WordNet® 3.0, © 2006 by Princeton University.
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