Pedalineae
A small natural order of annual or perennial herbs, rarely sub-shrubs, with vesicular glands, natives of the warmer regions of the globe, but most abundant in Africa. Flowers hermaphrodite, irregular, those of Old World genera axillary, solitary, or rarely fasciculate; those of American genera disposed in terminal racemes, shortly or very shortly pedicellate; calyx gamosepalous, parted nearly to the base into four, rarely five, segments, or rarely membranous, five-fid, and spathelike; corolla gamopetalous, tubular, often oblique or decurved at base, and more or less oblique at back; limb of five spreading lobes, usually bilabiate, imbricated; stamens alternating with the corolla lobes, usually included. Fruit capsular, nut-like, or rarely sub-drupaceous. Leaves opposite, or the upper ones alternate, entire, toothed, incised, or pedatifid. Sesamum or Gingilie Oil, largely used by Orientals, is extracted from the seeds of Sesamum indicum and S. orientale; but the species, generally speaking, have not much economic value. The order comprises a dozen genera, and only about forty species. Illustrative genera are: Martynia, Pedalium. Pterodiscus, and Sesamum.