The black tea is similar with the representative of Chinese black tea [Qi Men Black Tea] which has a hint of smoky flavor.

Ruhuna in island name of Sri Lanka when it is belong to Ceylon. It has meaning of South.
Sri Lanka has five famous tea (Uva, Nuwara Eliya, Dimbula,Kandy and Ruhuna). Ruhuna grown in the lowest altitude with the warmest climate.
As the special geographical location, the tea leaves are large and dark. It tastes little bitter and a hint of smoky flavor.