Monographs Details: Aristolochia
Authority: Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Description:Genus Description - Cal tubular, irregular, S-shaped or pipe-shaped and 3-lobed at the summit, or straight and with a single unilateral terminal lobe; pet none; stamens in ours 6; anthers sessile, adnate to the style; ovary inferior, 6-locular (in ours); style short and stout; stigma broad, with 6 (in ours) lobes or angles; fr a septicidal, lobed or angled capsule, with numerous compressed, horizontal seeds; herbs or woody vines, usually with broad, alternate, palmately veined lvs, and with small or large fls solitary or fascicled in the axils. 500, cosmop.