Hybrid tea is an informal horticultural classification for a group of garden
roses. They were created by cross-breeding two types
of roses, initially by hybridising Hybrid Perpetuals with Tea roses. Most hybrid tea bushes
tend to be somewhat upright in habit, and reach between 0.75 and 2.0 metres in
height, depending on the cultivar, growing conditions and pruning regime. It is
the provincial flower of Islamabad capital territory. Source