Room # 3

Botany Greenhouse

University of Wisconsin-Madison

Botany Department


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 Welwitschia mirabilis- Welwitchia (Welwitchiaceae)

This Paleo-mega-endemic is found only in the Namib Desert in southwestern Africa. Note the peculiar morphology- a caudex producing only 2 leaves (each with a basal meristem) and an immensely long taproot. The taproot serves to anchor the plant and does not absorb or transport water. Leaf at maturity reaches 6-8 feet long and 3 feet wide. It virtually never rains where this plant grows; it has adapted by getting its water via dew absorbed by stomata on the upper leaf surface.

   

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