Botany - St. John's Wort

Scientific name Hypericum perforatum
Appearance Upright perennial plant with branched stems, opposite leaves dotted with small translucent spots, yellow five-petaled flowers with long protruding stamens
Smell Herbaceous, slightly resinous, more pronounced after crushing
Color Bright green (foliage), intense yellow (flowers), dark red (oil macerate)
Used parts Flowering tops, oil obtained by maceration
Origins Europe, temperate Asia, naturalized in America
Toxicity level Moderate to high (photosensitizing, many drug interactions)