It's not pretty to look at, but Namibia's plant Welwitschia Mirabilis can truly claim to be one of a kind. There really is nothing like it. Welwitschia plant consists of only two leaves and a sturdy stem with roots. That's all! Two leaves continue to grow until they resemble the shaggy mane of some sci-fi alien. The stem thickens, rather than gains in height , and can grow to be almost 2 meters high and 8 meters wide. Their estimated lifespan is 400 to 1500 years.
(image on left thanks to: via)