wood-substance

Updated: May 9, 2025

This is a wood-pulp preparation, freed artificially from the so-called wood-substance or lignin. Having covered the flowers with care, and having gathered the seeds free from intermixtures and if possible separately for each single individual, it only remains to sow them in quantities that will yield the greatest possible number of individuals.

Hugo de Vries - Species and Varieties, Their Origin by Mutation