Tilia platyphyllos

From Free net encyclopedia

{{Taxobox | color = lightgreen | name = Tilia platyphyllos | image = Tilia platyphyllos(01).jpg | image_width = 250px | image_caption = Large-leaved Lime (Tilia platyphyllos) | regnum = Plantae | divisio = Magnoliophyta | classis = Magnoliopsida | ordo = Malvales | familia = Malvaceae | genus = Tilia | species = T. platyphyllos | binomial = Tilia platyphyllos | binomial_authority = Scop. }}

Tilia platyphyllos is a deciduous tree native to much of Europe, including locally in southwestern Britain, growing on lime-rich soils. The common name Large-leaved Linden is in standard use throughout the English-speaking world except in Britain, where it has largely (but not universally) been replaced by the name Large-leaved Lime. It is frequently planted as an ornamental tree in parks, or as a shade tree or a lawn tree. It has been introduced in the U.S.A. (New England).

It 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 gray bark with fine fissures and furrows. The branches spread upwards at wide angles. The twigs are reddish-green and slightly pubescent.

Image:Tilia platyphyllos(02).jpg The foliage consists of simple, alternately arranged leaves. As indicated by its common name, this tree has larger leaves than the related Tilia cordata (Small-leaved Linden), 6 to 9 cm (exceptionally 15 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 palmate 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.

The fruit is a small, round, tomentose, cream-colored nutlet with a diameter of 1 cm or less. It has a woody shell with 3-5 ridges.

There are several cultivars offered commercially in nurseries, including 'Rubra' (red twiiged) and 'Tortuosa' (twisted branches).

Tilia platyphyllos readily hybridises with Tilia cordata, the hybrid being named Tilia x europaea (Common Lime).cs:Lípa velkolistá da:Storbladet Lind de:Sommerlinde eo:Tilio grandfolia fr:Tilleul à grandes feuilles nl:Grootbladige linde tr:Büyük yapraklı ıhlamur