Lindens (Tilia sp.) are planted world-wide as street and shade trees. Often called ‘Lime Trees' in Europe, (both ‘Linden' and ‘Lime' are derived from the Germanic root ‘lind'), they are generally slightly or very conical in form and many hybrids exist which have been bred or selected for specific characteristics. The linden's form makes for a very uniform, well ordered boulevard. The American linden (Tilia americana) or basswood has many upright cultivars and is an excellent yard tree without quite the formality of many of the European and other hybrids. The lindens are a major Landscape Arboretum collection with 10 species and 22 cultivars. There are 46 specimens in the collection.