Another thing illustrated well in the photo (great photo) shows
the heavy if not pure I. variegata ancestry of 'Gracchus'. The spathes are
very typical for I. variegata and show no influence from I. pallida. The
hybrids that have a large amount of I. pallida in their ancestry have usually
smaller and partly (sometimes almost entirely) membranous to papery spathes with
the green color lacking in the parts that aren't foliaceous.