Saint John's wort also Saint John's·wort (jŏnzwûrt′, -wôrt′)
1. Any of various herbs or shrubs of the genus Hypericum, having opposite leaves and yellow flowers with five petals and numerous stamens. Also called hypericum.
2. A preparation made from one of these plants (H. perforatum), used in herbal medicine especially as an antidepressant.
[From its being gathered on Saint John's Eve to ward off evil.]
(click for a larger image)Saint John's wort
common Saint John's wort
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