A dwarf pine, Pinus nigra Nana is an evergreen, slow-growing tree with a compact, flat, sprawling habit. The stiff needles are deep green, and very dense. The brown cones may fall but often remain on the bush for years. Good in a low-maintenance or a city, courtyard or an architectural garden. Black Pine Nana is an easy tree that needs no pruning and looks really interesting without getting too big.