Tilia cordata (Small-leaved Lime, occasionally Small-leaved Linden or Little-leaf Linden) is a species of Tilia native to much of Europe and western Asia, north to southern Great Britain (north to about Durham), central Scandinavia, all over Romania, east to central Russia, and south to central Spain, Italy, Greece, Bulgaria, Turkey, and the Caucasus; in the south of its range it is restricted to high altitudes.
Tilia cordata is widely grown as an ornamental tree. It was much planted to form avenues in 17th and early 18th century landscape planning. A famous example is Unter den Linden in Berlin. Sarajevo's streets used to be lined with them as well and inspired a song by Bijelo Dugme. It is also widely cultivated in North America as a substitute for the native Tilia americana (American linden or basswood) which has a larger leaf, coarser in texture; there it has been renamed "Little-leaf Linden". It is popular as both a shade tree with its dense canopy, an ornamental tree with its architectural shape and a street Tree. In the USA, Tilia cordata has been planted in Wellesley, MA; Modesto, CA; Chicago, IL; Indianapolis, IN; and Atlanta, GA as street trees.  In Europe, there are espaliered trees due to the ability to survive heavy pruning. Tilia cordata is an easy tree to train for bonsai when the training is not done all at once. Letting the tree recoup inbetween sessions over a period of several months creates a healthy, good looking miniature tree. 
It is a deciduous tree growing to 20–40 m (60-80') tall, diameter 1/3 to 1/2 the height, with a trunk up to 1 m diameter. The crown is rounded in a formal ovel shape to pyramidal. Branching is upright and increases in density with age.  Tilia cordata makes for a great ornamental shade tree of an open lawn. Also makes a good screen or backdrop. It is very architectural.
It survives best in a pH range of 5.0 to 8.0.  USDA Hardiness Zone 3-7. Tilia cordata likes moist, well drained soil, can survive flooding but is not highly drought tolerant. For low pH, keep the soil moist while high pH should be dryer. It does not do well in soils with high salinity.
The leaves are alternately arranged, rounded to triangular-ovate, 3–8 cm long and broad, mostly hairless (unlike the related Tilia platyphyllos) except for small tufts of brown hair in the leaf vein axils - the leaves are distinctively heart-shaped. The buds are alternate, pointed egg shaped and have red scales. It has no terminal bud. The small yellow-green hermaphrodite flowers are produced in clusters of five to eleven in early summer with a leafy yellow-green subtending bract, have a rich, heavy scent; the trees are much visited by bees. The fruit is a dry nut-like drupe 6–7 mm long by 4 mm broad (infertile fruits are globose), downy at first becoming smooth at maturity, and (unlike T. platyphyllos) not ribbed. The bark is smooth and grayish when young, firm with vertical ridges and horizontal cracks when older. The Linden honey is considered to be valuable in both nutritional and medical aspects.
Pests and Diseases
This tree is fairly disease resistant. One problem is leaf scorch in dry soils. Leaf scorch is not a long term problem as the leaves are lost in the autumn. Pests include the Japanese beetles, aphids, lace bugs and caterpillars. They can strip the leaves or cause them to turn yellow.
Cultivation and Uses
- Corinthian ('Corzam')- dense, uniform limb spacing creates a compact, pyramidal, formal shape;darker and smaller leaves; resistant to Japanese beetles.
- Greenspire- the most common, a cross between the cultivar 'Euclid' and a selection from the Boston Parks, broadly used as a street tree, survives better under difficult conditions, overall a good looking, quick growing tree. 
- 'June Bride'- significantly pyramidal habit, evenly spaced branches around a very straight central leader, glossier leaves, and 3 to 4 times as many flowers. 
- Winter Orange- rich red-orange-brown stems with reddish buds, can be cut back to grow long shoot extensions. An extraordinarily colored cultivar.
- It readily hybridises with Tilia platyphyllos; the hybrid is named Tilia × europaea (syn. T. × vulgaris).
Linden Flower Tea
In the countries of Central Europe, Ukraine, Bulgaria and the former Yugoslavia, linden flowers are a traditional herbal remedy made into an herbal tea called 'Tilleul' (linden flower tea), considered to be of value as an anti-inflammatory in a range of respiratory problems: colds, fever, flu, sore throat, bronchitis, and cough. The tea is also good for aiding indigestion, calming hysteria fits, vomiting, and palpitations. 
Being in the basswood family, the white, finely-grained wood is a classic choice for refined woodcarvings such as those by Grinling Gibbons or several prominent medieval altars. Linden wood was the prime choice for the carvings in St. Paul's Cathedral, Windsor Castle, and Chatsworth. It is common for lightweight projects such as carved spoons, light furniture, bee hives and honeycomb frames. It is not a structurally sound material but is good for ornamentals and hives.
In Britain, it is considered an indicator of ancient woodland, and is becoming increasingly rare. Because of this rarity a number of woods have been given SSSI status. One such site is Shrawley Wood in Worcestershire.
The Najevnik linden tree (Slovene: Najevska lipa), an about 700 years old Tilia cordata, is the thickest tree in Slovenia. It is a place of cultural events, and every June a national meeting of Slovene politicians takes place under it.
Trees were found in northern Britain that were found to have established when the climate was warmer and have adapted to the cooling climate. The trees were estimated they started growing between 1150-1300 AD making them approaching 1000 years old. Due to the old age, the heartwood at the center disintegrates so rings can’t be counted so other methods had to be used.
|Wikimedia Commons has media related to Tilia cordata.|
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