View source for Mercurialis

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Mercurialis (from Mercury, who is supposed to have discovered some virtue in the plant). Euphorbiaceae. Mercury. Herbaceous plants of temperate regions, of little importance horticulturally. Lvs. opposite, simple: fls. apetalous, very small, in axillary clusters; calyx valvate; stamens 8-20, anther-cells spherical, attached by the apex and hanging; styles undivided; ovary 2-3-celled, 1 ovule in each cell. About 7 species, mostly in the Medit. region. Related to Mallotus and Acalypha. M. annua, Linn., is a weed in Eu. M. perennis, Linn., is a European poisonous plant, the foliage yielding an unstable blue dye.
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