Aristolochia watsonii Desert Pipevine
PERENNIAL. Long-lived; sprouts from a thick, gnarled taproot.
Very dark purplish or blackish green arrow-shaped leaves. Curved vase-shaped
flowers appear after rain. Oval, ribbed capsules hold many triangular
black seeds. Dies back in winter. Food plant for the Pipevine Swallowtail
butterfly. Occasional throughout the Empires in gravel washes or
coarse sand among boulders.
FAMILY: Aristolochiaceae (Pipevine Family)