''Populus deltoides'', the eastern cottonwood
or necklace poplar,
is a
cottonwood poplar native to
North America, growing throughout the eastern, central, and southwestern
United States as well as the southern Canadian prairies, the southernmost part of eastern
Canada, and northeastern
Mexico.
Description
''Populus deltoides'' is a large
tree growing to tall and with a trunk up to diameter, one of the largest North American
hardwood trees. The
bark
Bark may refer to:
* Bark (botany), an outer layer of a woody plant such as a tree or stick
* Bark (sound), a vocalization of some animals (which is commonly the dog)
Places
* Bark, Germany
* Bark, Warmian-Masurian Voivodeship, Poland
Arts, e ...
is silvery-white, smooth or lightly fissured when young, becoming dark gray and deeply fissured on old trees.
The twigs are grayish-yellow and stout, with large triangular leaf scars. The winter buds are slender, pointed, long, yellowish brown, and resinous. It is one of the fastest growing trees in North America. In Mississippi River bottoms, height growth of per year for a few years has been seen. Sustained height growth of height growth and diameter growth per year for 25 years is common.
The
leaves
A leaf ( : leaves) is any of the principal appendages of a vascular plant stem, usually borne laterally aboveground and specialized for photosynthesis. Leaves are collectively called foliage, as in "autumn foliage", while the leaves, ste ...
are large, deltoid (triangular), long and broad with a truncated (flattened) base and a petiole long. The leaf is very coarsely toothed, the teeth are curved and gland tipped, and the petiole is flat; they are dark green in the summer and turn yellow in the fall (but many cottonwoods in dry locations drop their leaves early from the combination of drought and leaf rust, making their fall color dull or absent). Due to the flat stem of the leaf, the leaf has the tendency to shake from even the slightest breeze. This is one of the identifying characteristics.
It is
dioecious, with the
flowers (
catkin
A catkin or ament is a slim, cylindrical flower cluster (a spike), with inconspicuous or no petals, usually wind- pollinated ( anemophilous) but sometimes insect-pollinated (as in ''Salix''). They contain many, usually unisexual flowers, arranged ...
s) produced on single-sex trees in early spring. The male (pollen) catkins are reddish-purple and long; the female catkins are green, long at pollination, maturing long with several seed capsules (samaras) in early summer, which split open to release the numerous small
seeds
A seed is an Plant embryogenesis, embryonic plant enclosed in a testa (botany), protective outer covering, along with a food reserve. The formation of the seed is a part of the process of reproduction in seed plants, the spermatophytes, includ ...
attached to
cotton-like strands. A single tree may release 40 million seeds a season.
[USGS Aquatic and Wetland Vascular Plants of the Northern Great Plains: A successful, simple, reproducible, high frequency micropropagation protocol has been described by Yadav Rakesh et al., 200]
''Populus deltoides''
[v-Plants (Chicago Herbarium)]
''Populus deltoides''
Variation
The species is divided into three
subspecies or up to five
varieties.
The subspecies classification is as follows:
*''Populus deltoides'' subsp. ''deltoides'', eastern cottonwood is found in southeastern Canada (the south of
Ontario and
Quebec) and the eastern United States (throughout, west to
North Dakota to
Texas).
*''P. d. monilifera'' (Aiton) Eckenw., the plains cottonwood (syn. ''P. deltoides'' var. ''occidentalis'' Rydb.; ''P. sargentii'' Dode) ranges from southcentral Canada (southern
Alberta
Alberta ( ) is one of the thirteen provinces and territories of Canada. It is part of Western Canada and is one of the three prairie provinces. Alberta is bordered by British Columbia to the west, Saskatchewan to the east, the Northwest Terri ...
,
Saskatchewan, and
Manitoba) to the central United States and south to northern
New Mexico and
Texas. It is the state tree of
Wyoming.
*''P. d. wislizeni'' (S.Watson) Eckenw., the Rio Grande cottonwood (syn. ''P. wislizeni'' (S.Watson) Sarg.; ''P. fremontii'' var. ''wislizeni'' S.Watson) grows from southern
Colorado
Colorado (, other variants) is a state in the Mountain West subregion of the Western United States. It encompasses most of the Southern Rocky Mountains, as well as the northeastern portion of the Colorado Plateau and the western edge of the ...
south through
Texas to northeastern Mexico (
Chihuahua Chihuahua may refer to:
Places
* Chihuahua (state), a Mexican state
**Chihuahua (dog), a breed of dog named after the state
**Chihuahua cheese, a type of cheese originating in the state
**Chihuahua City, the capital city of the state
**Chihuahua Mu ...
,
San Luis Potosi), and west to
Arizona (presence in
California, listed by GRIN,
is doubtful, not included in the Jepson ''Flora of California''
[Jepson Flora]
''Populus''
clicking 'next taxon' through the genus shows no entry for this taxon)). (Note: Some sources mistakenly spell the epithet "''wislizenii''". Correct spelling is with one "i", per ICN article 60C.2.)
Ecology
It needs bare soil and full sun for successful germination and establishment; in natural conditions, it usually grows near
rivers, with mud banks left after
floods providing ideal conditions for seedling germination; human soil cultivation has allowed it to increase its range away from such habitats.
Unlike related species such as
quaking aspen, it does not propagate through clonal colonies, but will resprout readily when cut down.
The leaves
serve as food for
caterpillar
Caterpillars ( ) are the larval stage of members of the order Lepidoptera (the insect order comprising butterflies and moths).
As with most common names, the application of the word is arbitrary, since the larvae of sawflies (suborder Symph ...
s of various
Lepidoptera.
Uses
The wood of eastern cottonwood is typical of the ''Populus'' family in its softness, weighing just . It is utilized for things like plywood and interior parts of furniture.
General Custer
George Armstrong Custer (December 5, 1839 – June 25, 1876) was a United States Army officer and cavalry commander in the American Civil War and the American Indian Wars.
Custer graduated from West Point in 1861 at the bottom of his class, ...
fed his horses and mules the bark during the 1868–69 winter campaign against Native American tribes south of Arkansas. According to
Charles Goodnight
Charles Goodnight (March 5, 1836 – December 12, 1929), also known as Charlie Goodnight, was a rancher in the American West. In 1955, he was inducted into the Hall of Great Westerners of the National Cowboy & Western Heritage Museum.
Early y ...
, cowboys afflicted with gastric disorders would make an astringent tea from the inner bark.
Oldest and largest
Eastern cottonwoods typically live 70–100 years, but they have the potential to live 200–400 years in ideal conditions.
The
Balmville Tree (felled in 2015 at approximately 316 years old) was the oldest eastern cottonwood in the United States.
*The US national champion ''Populus deltoides'' var. ''deltoides'' is located in
Beatrice, Nebraska
Beatrice () is a city in and the county seat of Gage County, Nebraska, United States. Its population was 12,459 at the 2010 census. Beatrice is located approximately 25 miles south of Lincoln on the Big Blue River and is surrounded by agricul ...
and measures tall, wide.
*The US national champion ''Populus deltoides'' var. ''monilifera'' is located in
Ravalli County, Montana
Ravalli County is a county in the southwestern part of the U.S. state of Montana. As of the 2020 census, the population was 44,174. Its county seat is Hamilton.
Ravalli County is part of a north–south mountain valley bordered by the Sapp ...
and measures tall, wide.
*The US national champion ''Populus deltoides'' var. ''wislizeni'' is located in
and measures tall, wide.
The largest recorded cottonwood tree in the world is the Frimley Park tree located in Hastings, New Zealand and measures tall, wide and in girth. This cottonwood was planted in the 1870s.
Symbolism
Calling the cottonwood tree "the pioneer of the prairie", the Kansas state legislature designated the cottonwood the official state tree of
Kansas in 1937. It became the state tree of
Wyoming in 1947, and that of
Nebraska since 1972.
See also
*
''Populus'' section ''Aigeiros''
References
External links
*
Video footage of Eastern Cottonwood
{{Authority control
deltoides
Symbols of Kansas
Symbols of Nebraska
Symbols of Wyoming
Trees of Alberta
Trees of humid continental climate
Trees of Mexico
Trees of Ontario
Trees of Saskatchewan
Trees of Eastern Canada
Trees of the Eastern United States
Trees of the Great Lakes region (North America)
Trees of the North-Central United States
Trees of the Northeastern United States
Trees of the Northwestern United States
Trees of the Plains-Midwest (United States)
Trees of the South-Central United States
Trees of the Southeastern United States
Trees of the Southwestern United States
Trees of the United States