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Towards the centre of the trunk, the wood gets less hard. The wood has a Janka ball hardness of 112.5 - 154.7 kgf/cm 2 (1600 – 2200 psi), which is greater than that of oak (70.3 - 84.4 kgf/cm 2) and Douglas fir (35.9 kgf/cm 2). Coconut timber is classified according to three degrees of density: High-density timber (dermal) – hard: 600–900 ...
Quercus subsericea [2] is a tree species in the beech family Fagaceae.There are no known subspecies. [3] [4] It is placed in subgenus Cerris, section Cyclobalanopsis.[5]This oak species is an emergent tropical forest tree, growing up to 52 m. tall and 0.86 m. dbh [6] and has been recorded from Malaysia, Indonesia, Philippines ().
The Cuban oak was first described by Nuttall in 1842 as Quercus sagraeana based on the specimen collected by Ramón de la Sagra. [3] Article 60.8(c) of the International Code of Nomenclature for algae, fungi, and plants provides that where personal names end in -a, the adjectival form of the specific epithet is formed by adding -n- plus the appropriate gender ending. [4]
It is referred to by the common name Kasnak oak, and is a rare species of tree native to Lebanon, Syria, and Turkey. [3] [4] It is placed in section Quercus. [5] Quercus vulcanica is highly valued in its native region as a source of lumber and also as an ornamental. It is a large tree up to 33 metres (108 feet) tall, with a trunk sometimes ...
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Quercus rysophylla is a large tree, up to 25 metres (82 feet) tall. It has smooth pale gray bark, which ages and becomes rough, deeply cracked and dark gray. [3] The leaves are lanceolate (lance shaped), up to 21 centimetres (8 + 1 ⁄ 4 inches) long. [4]
Quercus myrsinifolia is an evergreen oak tree that grows up to 20 metres (66 ft) tall. Leaves are 60–110 × 18–40 mm with serrulate margins; the petiole is 10–25 mm long. The acorns are ovoid to ellipsoid, 14–25 × 10–15 mm, and glabrous with a rounded apex; the flat scar is approx. 6 mm in diameter.