From this broad genus (80 species) of mainly European herbs, one has established itself as a favorite in gardens everywhere. G. odoratum (Asperula odorata), better known as Sweet Woodruff, can be used for flavoring wine, but its principal value is as an extremely attractive and durable ground cover for shaded areas. It also does well in the crevices of walks or as an edging plant. The soft green leaves are carried in whorls on stems generally 6-7in tall, and when its small-petaled white flowers appear above this lush carpet in May and June, the effect is enchanting. Sweet Woodruff thrives in practically any soil except arid desert soil and will spread aggressively, which is fine in a ground cover, less appealing in the border.