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Larix decidua is a medium-size to large deciduous coniferous tree reaching 25–45 m tall, with a trunk up to 1.5 m diameter (exceptionally, to 53.8 m tall [5] and 11.20 m girth [3.56 m diameter] [6]). The crown is conic when young, becoming broad and often irregular with age; the main branches are level to upswept, with the side branches often ...
The total number of needles of all ages present on the 36-year-old tree in 1961 was 5.25 million weighing 14.25 kg. In 1961, needles as old as 13 years remained on the tree. The ash weight of needles increased progressively with age from about 4% in first-year needles in 1961 to about 8% in needles 10 years old.
The species of the subfamily Laricoideae are evergreen or deciduous trees that can reach the greater heights in the Pinaceae family (over 100 meters with Pseudotsuga menziesii var. menziesii [2]). The leaves are needle-like [1] and have primary stomatal bands only on the abaxial surface (below the phloem vessels).
The needles are normally borne on a short shoot in groups of 10–20 needles. The larch is deciduous and the needles turn yellow in autumn. The seed cones are small, less than 2 cm (3 ⁄ 4 in) long, with lustrous brown scales. Larch are commonly found in swamps, fens, bogs, and other low-land areas.
Larches are deciduous conifers in the genus Larix, of the family Pinaceae (subfamily Laricoideae).Growing from 20 to 45 metres (65 to 150 feet) tall, [1] they are native to the cooler regions of the northern hemisphere, where they are found in lowland forests in the high latitudes, and high in mountains further south.
Evergreens in particular need to keep moisture reserves in their needles to counter drying winter winds. Even a deciduous tree can suffer injury or death to part of the root system if conditions ...
The great majority of conifer genera and species are evergreen, retaining their leaves for several (2–40) years before falling, but unusual deciduous conifers occur in five genera (Larix, Pseudolarix, Glyptostrobus, Metasequoia and Taxodium), shedding their leaves in autumn and leafless through the winter.
In the fields of horticulture and botany, the term deciduous (/ d ɪ ˈ s ɪ dʒ u. ə s /) [1] [2] means "falling off at maturity" [3] and "tending to fall off", [4] in reference to trees and shrubs that seasonally shed leaves, usually in the autumn; to the shedding of petals, after flowering; and to the shedding of ripe fruit.
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