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Tree taper is the degree to which a tree's stem or bole decreases in diameter as a function of height above ground. Within Forestry and for the purposes of timber production, trees with a high degree of taper are said to have poor form, while those with low taper have good form. The opposite is the case for open-grown amenity trees.
Knees with very little taper A bald cypress exhibiting tapered knees. A cypress knee is a distinctive structure forming above the roots of a cypress tree of any of various species of the subfamily Taxodioideae, such as the bald cypress. Their function is unknown, but they are generally seen on trees growing in swamps.
In general trees with a fat base or a trunk that quickly tapers scores low on the list, while trees that taper more slowly have higher values. Those trees with broken tops will have anomalously high values. If the base diameter is taken within the area of basal flare the overall volume will be anomalously low. [citation needed]
Girard form class is a form quotient calculated as the ratio of diameter inside bark at the top of the first 16 foot log to the diameter outside bark at breast height ().Its purpose is to estimate board-foot volume of whole trees from measurement of DBH, estimation of the number of logs, and estimation of the taper of the first log, based on the general relationships identified between the ...
The leaves are very variable in shape, most frequently narrowly oval or ovate-lanceolate, 4–8 centimetres (1 + 1 ⁄ 2 –3 inches) long (rarely to 10 cm long), 2–5 cm wide (rarely to 8 cm wide), rounded or broadly tapered at the base, pointed, the margins usually entire on mature trees, or (especially on young trees) more or less spiny ...
Chamaecyparis obtusa (Japanese cypress, hinoki cypress [2] or hinoki; Japanese: 檜 or 桧, hinoki) is a species of cypress native to central Japan in East Asia, [3] [4] and widely cultivated in the temperate northern hemisphere for its high-quality timber and ornamental qualities, with many cultivars commercially available.
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Douglas-fir is a medium-sized to extremely large evergreen tree, 20–100 metres (70–330 feet) tall (although only coast Douglas-firs, reach heights near 100 m) [10] and commonly reach 2.4 m (8 ft) in diameter, [11] although trees with diameters of almost 5 m (16 ft) exist. [12]