Large-leaf poplar
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The large-leaf poplar ( Populus lasiocarpa ) is a deciduous tree from the genus poplar in the willow family. Their natural range is in central and western China. There it is an important supplier of wood.
description
The large-leaf poplar is a small, slowly growing deciduous tree with a round crown, up to 20 meters high, which can reach a diameter of 50 centimeters at chest height . The trunk bark is dark gray and furrowed. Young twigs are thick and densely tomentose, they later bald and then have a yellow-brown color. The buds are large, long, pointed, and somewhat sticky. The leaves have a 5 to 10 centimeter long, hairy, flat stem that is red on the top. The leaf blade is egg-shaped, 15 to 30 centimeters long and 10 to 15 centimeters wide, pointed with a heart-shaped base and a glandular serrate edge. The upper side of the leaf is light green, initially hairy, later glabrous and has red central and lateral veins. The underside is hairy, especially on the nerves. The flowers are like all poplars dioecious distributed. The male catkins are 9 centimeters long, the male flowers have 30 to 40 stamens . The female kittens are about 15 to 24 centimeters long. The capsule fruits are egg-shaped, 1.0 to 1.7 inches long and tomentose. The species blooms from March to May, the fruits ripen from May to June.
The number of chromosomes is 2n = 38.
leaves
Male kittens
Distribution and location
The natural range is in the temperate zone of China in the provinces of Guizhou , Hubei , Shaanxi , Sichuan and Yunnan . There it grows in species-rich, moist deciduous forests on mountain slopes and river banks at altitudes of 1300 to 3500 meters on fresh to moist, good, mostly loamy, slightly acidic to alkaline soils in sunny locations. The species loves warmth and is usually frost hardy.
Systematics and research history
The bulk sheet poplar is a species from the section Leucoides in the genus of poplar ( Populus ), family of the pasture plants (Salicaceae). It was first described by Daniel Oliver in 1890 .
There are two varieties :
- Populus lasiocarpa var. Lasiocarpa with 15 to 24 centimeters long female catkins and 1.0 to 1.7 centimeters long and short-stalked capsule fruits.
- Populus lasiocarpa var. Longiamenta P. Y. Mao & PX He with up to 40 centimeters long female catkins and 1.6 to 1.9 centimeters long, sedentary fruits. The distribution area is in Yunnan at altitudes of 1700 to 1900 meters.
use
The large-leaf poplar is an important supplier of wood in its area of distribution. In Central Europe it is used as an ornamental tree because of its attractive foliage , but is of no importance for forestry.
proof
literature
- Andreas Roloff , Andreas Bärtels: Flora of the woods. Purpose, properties and use. With a winter key from Bernd Schulz. 3rd, corrected edition. Eugen Ulmer, Stuttgart (Hohenheim) 2008, ISBN 978-3-8001-5614-6 , p. 465.
- Schütt, Schuck, Stimm: Lexicon of tree and shrub species . Nikol, Hamburg 2002, ISBN 3-933203-53-8 , pp. 397 .
- Wu Zheng-yi, Peter H. Raven (Ed.): Flora of China . Volume 4: Cycadaceae through Fagaceae . Science Press / Missouri Botanical Garden Press, Beijing / St. Louis 1999, ISBN 0-915279-70-3 , pp. 147 (English).
Individual evidence
- ↑ German name after Roloff et al .: Flora der Gehölze , p. 465 and Schütt et al .: Lexicon of tree and shrub species , p. 397
- ↑ a b Roloff et al .: Flora of the Woods , p. 465
- ↑ a b c d Liguo Fu, Nan Li, Thomas S. Elias, Robert R. Mill: Populus lasiocarpa . In: Wu Zheng-yi, Peter H. Raven (Ed.): Flora of China . Volume 4: Cycadaceae through Fagaceae . Science Press / Missouri Botanical Garden Press, Beijing / St. Louis 1999, ISBN 0-915279-70-3 , pp. 147 (English).
- ↑ Populus lasiocarpa at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis
- ↑ a b Populus lasiocarpa. In: Germplasm Resources Information Network (GRIN). United States Department of Agriculture, accessed January 14, 2012 .
- ↑ a b c Schütt et al .: Lexicon of Tree and Shrub Species , p. 397
- ↑ Hooker's Icones Plantarum; or Figures, with brief Descriptive Characters and Remarks of New or Rare Plants , quoted from Populus lasiocarpa. In: Germplasm Resources Information Network (GRIN). United States Department of Agriculture, accessed January 14, 2012 .
