Plant Galls
Stem plant e.g. oak. Medicinal drug Plant galls are growth abnormalities caused in plants (especially leaves) by insects, e.g., by the oviposition of the gall wasp or by aphids; cf. figure. Gall apple – Galla: The gall produced by the female gall wasp Hartig on leaf buds of (PH 4) – no longer officinal today. … Plant Galls