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'''''Aristolochia''''' is a large [[plant]] [[genus]] with over 500 [[species]]. Collectively known as '''birthworts''', '''pipevines''' or '''[[Dutchman's pipe]]s''', they are the namesake of the [[family (biology)|family]] ([[Aristolochiaceae]]). They are widespread and occur in the most diverse climates. Some species, like ''[[Aristolochia utriformis|A. utriformis]]'' and ''[[Aristolochia westlandii|A. westlandii]]'', are threatened with [[extinct]]ion.