This is a sport of the species,
H. longissima, that was
collected in the wild in
Kiyoshi Kato. It was registered on his behalf by
Wm Zumbar of Ohio in 1984. The narrow leafed
plant has green foliage with yellow to white marginal
variegation. It is a small size plant that bears pale lavender
flowers in September.
The Hostapedia by Mark Zilis (2009), "...only differs from 'Asahi Sunray' in that its yellow margins
turn to white during the growing season."