Lyptus® is merely a trade name, which is a registered trademark owned by the Brazilian company Fibria. The Lyptus® brand is marketed in the United States by Weyerhaeuser. The actual tree species, which is grown on Brazilian plantations owned by Fibria, is a Eucalyptus hybrid of Eucalyptus grandis and E. urophylla.
In terms of mechanical/physical characteristics, Lyptus® has a very high shrinkage rate, and is likely to experience a fair amount of seasonal movement. The wood is relatively hard, heavy, and strong, though as a general rule, the paler pinkish brown boards tend to be less dense, while the darker reddish brown boards tend to be heavier and harder.