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Pinus durangensis is an evergreen tree reaching 25–40 metres (82–131 ft) in height, with a trunk up to 1 metre (3.3 ft) in diameter and a broad, rounded crown. The bark is thick, dark gray-brown, and scaly or fissured. [2]
These two characters readily distinguish the major groups of pines (see Pinus classification). Pinus durangensis (Durango pine) has fascicles of 6 needles, rarely 7, and is the only species in Pinus with so many needles per fascicle. At the other extreme, Pinus monophylla has fascicles of one needle, rarely two.
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A pine is any conifer tree or shrub in the genus Pinus (/ ˈ p aɪ n ə s /) [2] of the family Pinaceae. Pinus is the sole genus in the subfamily Pinoideae.. World Flora Online accepts 134 species-rank taxa (119 species and 15 nothospecies) of pines as current, with additional synonyms, [3] and Plants of the World Online 126 species-rank taxa (113 species and 13 nothospecies), [4] making it ...
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Its leaves are needle-shaped, evergreen, in fascicles of two, needle-like, straight or slightly twisted, stiff, sharp-pointed, light yellowish-green, spread apart; edges toothed and 2–4 cm (3 ⁄ 4 – 1 + 1 ⁄ 2 in) long. The bundle-sheath is persistent. The buds are blunt pointed, up to 15 mm long, reddish-brown, and resinous.
The leaves are in fascicles of three, [6] needle-like, yellow-green, twisted, and 9–15 centimeters (3 + 1 ⁄ 2 –6 in) long. The cones are resin-sealed and irregularly shaped, [4] 8–16 cm (3 + 1 ⁄ 4 – 6 + 1 ⁄ 4 in) long and clustered in whorls of three to six on the branches. The scales end in a short stout prickle.
[2] [4] Elsewhere in the world it is measured at a height of 1.3 meters, [19] 1.4 meters, [5] [20] or 1.5 meters. [21] Tree girth measurement is commonly performed by wrapping a tape around the trunk at the correct height.