Definition of "nodose"

The epidermal cells of the capsule wall of Jubulopsis, with nodose "trigones" at the angles, are very reminiscent of what one finds in Frullania spp.

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, pages 4-5