Pinus pseudostrobus
Pinus pseudostrobus
Pinus pseudostrobus is a native to Mexico and Guatemala plant species of the genus pine (Pinus ).
Features
Pinus pseudostrobus a tree, plant height of 30 to 40 m high, from 40 to 80 cm rarely to 45 m and trunk diameter, rarely reaches even 100 cm. The trunk is usually straight and free of branches up to 20 or 30 m in height. The branches are mostly horizontal. In old trees the crown is round, young trees have an open, pyramidal crown with remotely located branches. The bark is dark brown in old trees, thick and divided by deep vertical cracks in rough, scaly plates. In the upper stem region the bark is smooth and reddish brown. In young trees the bark is smooth and reddish to gray - brown. The branches are slender, easily maintained and smooth.
The needle leaves are in clusters on short shoots five of them. The sheaths are subject to change, light to dark brown and 12 to 15 mm long. The needle leaves are slender, pliable, 20 to 25 cm long. The margin is finely serrated. There are usually three ( rarely two or four ) resin canals present. There are two vascular bundles, which are adjacent to, but separated.
The cones are elongate - conical, the small cone scales carry small, upright spikes. They are available individually or in groups of 2 to 3 on stiff, scaly stems.
The cones are ovoid to long - ovoid, slightly curved. They are 8-10 cm long and 5-7 cm wide open. The color is light brown. The cones open to the maturity and fall soon thereafter. If they fall off the stalk and some of the lowest cone scales remain on the branch. The cone scales are thin, medium-hard. The apophysis is slightly raised to flat, transversely keeled, umbo of the dorsal is sitting, small, and armed with a small, sloping spine.
The seeds are approximately 6 mm long, dark brown. The seed wing is 20 to 23 mm long, dark brown. The number of cotyledons is usually eight (rarely six to nine ).
The wood is light yellow, quite soft, but strong and slightly resinous. The trees are processed into sawn timber, partially also for fire wood and used for resin production.
Dissemination and locations
Pinus pseudostrobus is found mainly in Mexico, however, the area extends to Guatemala. The largest deposits are in the Central Volcanic Mountain Range, which runs on the latitude of Mexico city from west to east through Mexico. The deposits are located in the states of Jalisco, Michoacán, México, Distrito Federal de México, Morelos, Hidalgo, Puebla, Tlaxcala, Veracruz, Oaxaca, Guerrero and Chiapas. In Guatemala, it is found in the southern parts of the country.
It grows at altitudes 1600-3200 m mainly on mountain slopes. The annual rainfall varies in the region from 800 to 1500 mm. The largest trees grow in Michoacán in 2000 to 2400 m on deep volcanic soil. In many areas of their range, the species Pinus douglasiana, Pinus Michoacana, Pinus and Pinus maximinoi grows along with various kinds of fir (Abies spp. ) And Pinus montezumae, pringlei.
System
Pinus pseudostrobus was first described in 1839 by John Lindley.
Synonyms are Pinus orizabae G.Gordon, P. protuberans Roezl, P. angulata Roezl, P. brisk liana Roezl, P. angulata var protuberans ( Roezl ) Carrière, P. pseudostrobus var estvezii Martínez, P. pseudostrobus var coatepecensis Martinez, P. pseudostrobus var apulcensis ( Lindl. ) Martínez, P. pseudostrobus format megacarpa Loock. , P. estevezii ( Martínez ) JPPerry, P. pseudostrobus subsp. apulcensis ( Lindl. ) sensu Stead, P. nubicola JPPerry, P. pseudostrobus var laubenfelsii Silba, P. yecorensis Debreczy et Rácz, P. yecorensis var sinaloensis Debreczy et Rácz, Pinus apulcensis Lindl., P. pseudostrobus var apulcensis ( Lindl. ) Martínez, P. pseudostrobus format megacarpa Loock, P. pseudostrobus subsp. apulcensis ( Lindl. ) Stead, P. pseudostrobus var oaxacana Martínez, P. oaxacana Mirov, P. pseudostrobus var oaxacana ( Mirov ) SGHarrison and P. oaxacana var diversiformis Debreczy et Rácz.
Documents
Jesse P. Perry: The Pines of Mexico and Central America. Timber Press, Portland, 1991, ISBN 0-88192-174-2, pp. 137ff.