Pet white or lavender purple, with slender claw and broadly rounded blade; short filaments flanked on each side by a pair of glands of different size; anthers short and blunt; ovary ovoid, with 1-8 ovules per locule; style very short; fr orbicular to ovate, flattened parallel to the septum; style persistent; herbs with entire lvs, ±pubescent with 2-pronged hairs longitudinally appressed to the stem and branches. 4, mostly Mediterranean.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
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