Appearance
''Tilia platyphyllos'' is a narrowly domed tree with a moderate growth rate, and can eventually attain a height of 40 m. The reddish-brown young stems later develop dark grey bark with fine fissures and furrows. The branches spread upwards at wide angles. The twigs are reddish-green and slightly pubescent. The foliage consists of simple, alternately arranged leaves. As indicated by its common name, this tree has larger leaves than the related ''Tilia cordata'' , 6 to 9 cm . They are ovate to cordate, mid to dark green above and below, with white downy hair on the underside, particularly along the veins, tapering into a mucronate tip. The margin is sharply serrate, and the base cordate; the venation is pinnate along a midrib. The pubescent petiole is usually 3–4 cm long, but can vary between 1.5–5 cm. The autumn foliage is yellow-green to yellow.The small, fragrant, yellowish-white flowers are arranged in drooping, cymose clusters in groups of 3 to 4. Their whitish-green, leaf-like bracts have an oblong-obovate shape. The geniculate peduncles are between 1.5–3 cm long. The hermaphroditic flowers have 5 sepals and 5 tepals, numerous stamens, but no staminodes. The superior ovary is 2–10 locular with one smooth style. The flowers are pollinated by bees and some butterflies, notably the White-letter Hairstreak. The fruit is a fat, round, tomentose, cream-colored nutlet with a diameter of 1 cm or less. It has a woody shell with 3–5 ridges.
Evolution
Fossils of ''Tilia platyphyllos'' have been described from the fossil flora of Kızılcahamam district in Turkey, which is of early Pliocene age.References:
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