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perianth (plural perianths)
- (botany) The sterile parts of a flower; collectively, the sepals and petals (or tepals).
- (botany, bryology) The sterile, tubelike tissue that surrounds the female reproductive structure in a leafy liverwort.
- 1992, Rudolf M[athias] Schuster, The Hepaticae and Anthocerotae of North America: East of the Hundredth Meridian, volume V, New York, N.Y.: Columbia University Press, →ISBN, page 5:
- Archegonia are surrounded early in their development by the juvenile perianth, through the slender beak of which the elongated neck of the fertilized archegonium protrudes.
sterile parts of a flower