The cottonwoods are three species of poplars in the section Aegiros of the genus Populus, native to North America, Europe and western Asia. Cottonwood is a popular poplar. ... This article is about woody plants of the genus Populus. ... North America North America is a continent[1] in the Earths northern hemisphere and (chiefly) western hemisphere. ... For other uses, see Europe (disambiguation). ... For other uses, see Asia (disambiguation). ...

The name is also commonly used for any species of poplar in the United States, including some poplars not in the section Aegiros, notably the Swamp cottonwood Populus heterophylla (in the section Leucoides) and the Black and Narrowleaf Cottonwoods P. trichocarpa and P. angustifolia (balsam poplars in the section Tacamahaca). Species Populus angustifolia Torr. ...

Those in section Aegiros are large deciduous trees 20-45 m tall, distinguished by thick, deeply fissured bark, and triangular-based to diamond-shaped leaves, green on both sides (without the whitish wax on the undersides of balsam poplar leaves), and without any obvious balsam scent in spring. An important feature of the leaves is the petiole which is flattened sideways, so that the leaves have a particular type of movement in the wind. The aspens (Populus section Populus) share this characteristic, but not the balsam poplars. The coniferous Coast Redwood, the tallest tree species on earth. ... For other meanings of bark, see Bark (disambiguation). ... Look up foliage in Wiktionary, the free dictionary. ... Species Populus adenopoda Populus alba Populus grandidentata Populus sieboldii Populus tremula Populus tremuloides Aspens are trees of the willow family and comprise a section of the poplar genus, Populus sect. ...

Male and female flowers are in separate catkins, appearing before the leaves in spring. The seeds are borne on cottony structures which allow them to be blown long distances in the air before settling to ground. Look up flower in Wiktionary, the free dictionary. ... A male catkin on a willow a male flowering catkin on a willow Catkins, or aments, are slim, cylindrical flower clusters, wind-pollinated (anemophilous) and without petals, that can be found in many plant families, including Betulaceae, Fagaceae, Moraceae, and Salicaceae. ... Cotton ready for harvest. ...

A Cottonwood tree in the Fall.

The cottonwoods are exceptionally tolerant of flooding, erosion and flood deposits filling around the trunk. Image File history File links Metadata Size of this preview: 545 × 600 pixelsFull resolution (1204 × 1325 pixel, file size: 429 KB, MIME type: image/jpeg) File historyClick on a date/time to view the file as it appeared at that time. ... Image File history File links Metadata Size of this preview: 545 × 600 pixelsFull resolution (1204 × 1325 pixel, file size: 429 KB, MIME type: image/jpeg) File historyClick on a date/time to view the file as it appeared at that time. ... A flood (in Old English flod, a word common to Teutonic languages; compare German Flut, Dutch vloed from the same root as is seen in flow, float) is an overflow of water, an expanse of water submerging land, a deluge. ... Severe soil erosion in a wheat field near Washington State University, USA. For erosion as an operation of Mathematical morphology, see Erosion (morphology) Erosion is displacement of solids (soil, mud, rock and other particles) by the agents of ocean currents, wind, water, or ice by downward or down-slope movement...

In the past up to five or six species were accepted, but recent trends have been to accept just three species, treating the others as subspecies of P. deltoides.

The Eastern Cottonwood Populus deltoides is one of the largest North American hardwood trees, although the wood is rather soft. It is a riparian zone tree. It occurs throughout the eastern United States and just into northern Canada. The leaves are alternate and simple, with coarsely-toothed (crenate/serrate) edges, and subcordate at the base. The leaf shape is roughly triangular, hence the species name, deltoides. Binomial name Populus deltoides L. The Eastern Cottonwood (Populus deltoides) is a large poplar tree native to North America, growing throughout the eastern United States and the southernmost part of eastern Canada. ... Beech is a typical temperate zone hardwood For the record label, see Hardwood Records. ... A riparian zone schematic from the Everglades. ... Look up foliage in Wiktionary, the free dictionary. ...

In the typical subspecies deltoides (Vermont south to northern Florida and west to about Michigan), the leaves are broad triangular, 7-15 cm across at the base. Further west (Minnesota south to eastern Texas), the subspecies molinifera (Plains Cottonwood; syn. P. sargentii) has somewhat narrower leaves 5-10 cm wide at the base. This is also the state tree of both Wyoming and Kansas. In western Texas, New Mexico and Colorado the subspecies wislizeni (Rio Grande Cottonwood; syn. P. wislizeni) occurs. Official language(s) None Capital Montpelier Largest city Burlington Area  Ranked 45th  - Total 9,620 sq mi (24,923 km²)  - Width 80 miles (130 km)  - Length 160 miles (260 km)  - % water 3. ... Official language(s) English Capital Tallahassee Largest city Jacksonville Largest metro area Miami metropolitan area Area  Ranked 22nd  - Total 65,795[1] sq mi (170,304[1] km²)  - Width 361 miles (582 km)  - Length 447 miles (721 km)  - % water 17. ... Official language(s) None (English, de-facto) Capital Lansing Largest city Detroit Largest metro area Metro Detroit Area  Ranked 11th  - Total 97,990 sq mi (253,793 km²)  - Width 239 miles (385 km)  - Length 491 miles (790 km)  - % water 41. ... Capital Saint Paul Largest city Minneapolis Area  Ranked 12th  - Total 87,014 sq mi (225,365 km²)  - Width 250 miles (400 km)  - Length 400 miles (645 km)  - % water 8. ... Official language(s) No official language See languages of Texas Capital Austin Largest city Houston Largest metro area Dallas–Fort Worth Metroplex Area  Ranked 2nd  - Total 261,797 sq mi (678,051 km²)  - Width 773 miles (1,244 km)  - Length 790 miles (1,270 km)  - % water 2. ... This List of U.S. state trees includes official trees of the following states and U.S. possessions: See also Lists of U.S. state insignia National Grove of State Trees External link USDA list of state trees and flowers Categories: | | ... Official language(s) English Capital Cheyenne Largest city Cheyenne Area  Ranked 10th  - Total 97,818 sq mi (253,348 km²)  - Width 280 miles (450 km)  - Length 360 miles (580 km)  - % water 0. ... Official language(s) English[2] Capital Topeka Largest city Wichita Area  Ranked 15th  - Total 82,277 sq mi (213,096 km²)  - Width 211 miles (340 km)  - Length 417 miles (645 km)  - % water 0. ... Capital Santa Fe Largest city Albuquerque Area  Ranked 5th  - Total 121,665 sq mi (315,194 km²)  - Width 342 miles (550 km)  - Length 370 miles (595 km)  - % water 0. ... Official language(s) English Capital Denver Largest city Denver Largest metro area Denver-Aurora Metro Area Area  Ranked 8th  - Total 104,185 sq mi (269,837 km²)  - Width 280 miles (451 km)  - Length 380 miles (612 km)  - % water 0. ...

The Fremont Cottonwood Populus fremontii occurs in California east to Utah and Arizona and south into northwest Mexico; it is similar to Eastern Cottonwood, differing mainly in the leaves having fewer, larger serrations on the edge, and small differences in the flower and seed pod structure. Official language(s) English Capital Sacramento Largest city Los Angeles Largest metro area Greater Los Angeles Area  Ranked 3rd  - Total 158,302 sq mi (410,000 km²)  - Width 250 miles (400 km)  - Length 770 miles (1,240 km)  - % water 4. ... This article is about the U.S. state. ... Official language(s) English Spoken language(s) English 74. ...

The third species, Black Poplar Populus nigra, native of Europe and western Asia, is distinct in its much smaller leaves, 5-11 cm across, with a more rhombic (diamond) shape; see the link for further details. Black poplar (Populus nigra) is a species of poplar in the cottonwood section of the genus (Populus sect. ...

Cultivation and uses

Cottonwoods are widely grown for timber production along wet river banks, where their exceptional growth rate provides a large crop of wood within just 10-30 years. The wood is coarse and of fairly low value, used for pallet boxes, shipping crates and similar, where a coarse but cheap and strong wood is suitable. They are also widely grown as screens and shelterbelts. Many of the cottonwoods grown commercially are the hybrid between Eastern Cottonwood and Black Poplar, Populus × canadensis (Hybrid Black Poplar or Carolina Poplar). Timber in storage for later processing at a sawmill Timber is a term used to describe wood, either standing or that has been processed for use—from the time trees are felled, to its end product as a material suitable for industrial use—as structural material for construction or wood... // This article is about a biological term. ...

Felling a cottonwood tree usually involves making an initial deep chainsaw cut to drain the water.

Cottonwood bark is often a favorite medium for artisans. The bark, which is usually harvested in the fall after a tree's death, is generally very soft and easy to carve.

Cottonwood is one of the poorest woods to use as Wood fuel. It does not dry well, and rots quickly. It splits poorly, because it is very fibrous. It produces the lowest BTUs per cord of wood[1]. Wood burning is the largest current use of biomass derived energy. ... The British thermal unit (BTU) is a non-metric unit of energy, used in the United States and, to a certain extent, the UK. The SI unit is the joule (J), which is used by most other countries. ... The cord is a unit of dry volume used in the United States to measure firewood. ...

Cottonwoods serve as food for the caterpillars of several Lepidoptera. See List of Lepidoptera which feed on poplars. This article is about a form of an insect. ... The order Lepidoptera is the second most speciose order in the class Insecta and includes the butterflies, moths and skippers. ... Poplars (Populus spp) are used as food plants by the larvae of a large number of Lepidoptera species: Monophagous species which feed exclusively on Populus Bucculatrix staintonella Figure of Eighty (Tethea ocularis) Polyphagous species which feed on Populus among other plants Autumnal Moth (Epirrita autumnata) The Brick (Agrochola circellaris) Brown...

External links

• Swamp Cottonwood, Populus heterophylla Large-format diagnostic photographs, species information. Morton Arboretum acc. 144-91-6
• Minnesota DNR big tree list The largest tree by circumference in Minnesota is a populus deltoides at 394 inches (1,001 centimeters) measured at the trunk 4 and 1/2 feet (137 cm) above the ground. This tree is 106 feet (32.31 meters) tall.

• Large Ohio Cottonwood Tree [2]