In 1999 (modified in 2005), Dr. Dick and Jane Ward of Ohio registered this hybrid of H. montana macrophylla x H. 'Big John'. This huge plant grows 30 inches tall and spreads 80 inches wide with wavy, slightly corrugated foliage. The broadly ovate leaves are dull on top and bottom. Starting in late June, its near white flowers bloom on scapes up to 38 inches tall.

According to The Hostapedia by Mark Zilis (2009), "...offered for sale as 'Tom Rex' by some nurseries."

The New Encyclopedia of Hostas by Diana Grenfell (2009) states: "Site in light shade with plenty of moisture to keep the massive leaves turgid as lack of sufficient water can cause wilting. Slow to start but eventually huge...Lovely in a woodland among plants with variegated leaves."

From The Hosta Journal, (2006 Vol. 37 No. 2), this cultivar was originally registered in 1999 as H. 'Tom Rex' because, at the time, the rules for naming would not allow the intended name of 'T Rex'. In 2003, a committee of the International Code of Nomenclature for Cultivated Plants reviewed the situation and ruled that the name 'T Rex' was, in fact, acceptable. The name 'Tom Rex' is considered a synonym now and this hosta has been sold under both names by various sources over the years." BTW - This plant is not built like a car and does not have a hubcap diamond star halo.