Aristolochia macrophylla, syn. A. durioromentosa
Aristolochiaceae (Birthworth) Family
The flowers are solitary or paired in the leaf axil; bisexual in nature, irregular in shape. The sepals are 3-lobed; yellowish or tan with purple lobes and mouth; six stamens, no petals. The flower is carrion-scented. Flowers occur in the spring and early summer.
Related species are A. serpentaria (which may be erect or reclining), and A. durior (a climbing vine). Dutchmans Pipe is often cultivated in wildflower gardens. The flowers were once used as an aid in childbirth, since they were thought to resemble a human fetus.