This
Korean species is characterized by
having a spreading, medium sized (19 inches high) mound of green foliage and the fact that its
dark purple flowers remain closed. It spreads by
rhizomes and
makes a good ground cover. Petioles of this species are covered
with reddish purple dots.
H. clausa 'Normalis',
according to
The Hosta Handbook by
Mark Zilis (2000), is the "...same as the species, except that the flowers
open normally..."
