sentences:  "G." 'Radicans' is a low-growing groundcover which reaches 15–45 cm (6–18 in) and spreads up to a metre wide, while "G." 'Fortuniana' and "G." 'Mystery' are double-flowered cultivars.The former was sent by Scottish botanist Robert Fortune in 1844 to the Royal Horticultural Society in London.The latter has a large upright habit and has been a popular variety good for hedging.