. The drug plants of Illinois . HYPERICUM PERFORATUM L. St. John's-wort, Tipton weed, Klamath weed, rosin rose. Hypericaceae.—An erect, upwardly much-branched, very leafy herb 1 to 21/ feet tall, perennial; taproot woody; stem slender, somewhat 2-ridged, smooth, dark-ringed at the nodes, with basal runners; leaves elliptic, sessile, entire, opposite, Yi to 34 inch long, black-dotted; flowers yellow, black-dotted, ^"4 to 1 inch wide, numerous in terminal cymes; fruit a many-seeded capsule. The flowering tops collected. Infre- quent to abundant throughout the state as a weed in poor soil, a
. The drug plants of Illinois . HYPERICUM PERFORATUM L. St. John's-wort, Tipton weed, Klamath weed, rosin rose. Hypericaceae.—An erect, upwardly much-branched, very leafy herb 1 to 21/ feet tall, perennial; taproot woody; stem slender, somewhat 2-ridged, smooth, dark-ringed at the nodes, with basal runners; leaves elliptic, sessile, entire, opposite, Yi to 34 inch long, black-dotted; flowers yellow, black-dotted, ^"4 to 1 inch wide, numerous in terminal cymes; fruit a many-seeded capsule. The flowering tops collected. Infre- quent to abundant throughout the state as a weed in poor soil, along roads, and in waste places. Contains the volatile oil of hypericum (red oil) and the fluorescent substances hy- pericin and hypericum red. The oil is used as an application to heal cuts and bruises.
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Keywords: ., boo, bookcentury1900, booksubjectbotany, booksubjectbotanymedical
