Dr. Doug and Mardy Beilstein of Ohio in
this large size (24 inches high by 48 inches wide) cultivar is a
Seedling 04 B1" streaked seedling ×
It has intensively powdery blue-green foliage which is
nearly round, slightly cupped, moderately corrugated,
slightly cupped (both upwards and downwards) and has a
glaucous bloom on top. Near white flowers bloom from
late June into July on scapes around 30 inches tall. It
sets seeds but few of them are viable.
registration materials state: "...Very glaucous,
powdery blue-green color fades to very dark green
(almost black). Most leaves are relatively flat, but
some cup upwards, some down. Add almost white flowers
and 'Jet Black' lives up to its name...After bloom is
gone, leaves look almost black."