Fresh market blackberries can feel “seedy” when consumed. This “seediness” is associated with the presence of pyrenes which are comprised of a single seed enclosed in an endocarp. Small pyrene size (
Sebesta, Bethany; Clark, John R.; Threlfall, Renee T.; and Howard, Luke R.
"Characterization of seediness attributes of blackberry genotypes,"
Discovery The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences: Vol. 14
, Article 13.
Available at: http://scholarworks.uark.edu/discoverymag/vol14/iss1/13