Populus deltoides

Botanical Name : Populus deltoides
Family: Salicaceae
Genus: Populus
Section: Aigeiros
Species: P. deltoides
Kingdom: Plantae
Order: Malpighiales

Common Names : Eastern Cottonwood, Plains cottonwood, Rio Grande cottonwood, Necklace Poplar

Habitat : Populus deltoides is native to North America, growing throughout the eastern, central, and southwestern United States.Itis found on rich moist soils, mainly along riverbanks, bottoms and rich woods.

Description:
Populus deltoides is a large tree growing to 20–40 m (66–131 ft) tall and with a trunk up to 1.8 m (5.9 ft) diameter, one of the largest North American hardwood trees. The bark 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, 1–2 cm long (.039–0.79 inches), yellowish brown, and resinous. It is one of the fastest growing trees in North America. In Mississippi River bottoms, height growth of 10–15 ft per year for a few years have been seen. Sustained height growth of 5 foot height growth and 1 inch diameter growth per year for 25 years is common.

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The leaves are large, deltoid (triangular), 4–10 cm (1.6–3.9 in) long and 4–11 cm (1.6–4.3 in) broad with a truncated (flattened) base and a petiole 3–12 cm (1.2–4.7 in) 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.

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It is dioecious, with the flowers (catkins) produced on single-sex trees in early spring. The male (pollen) catkins are reddish-purple and 8–10 cm (3.1–3.9 in) long; the female catkins are green, 7–13 cm (2.8–5.1 in) long at pollination, maturing 15–20 cm (5.9–7.9 in) long with several 6–15 mm (0.24–0.59 in) seed capsules in early summer, which split open to release the numerous small seeds attached to cotton-like strands.

Cultivation :
Landscape Uses: Erosion control, Aggressive surface roots possible. An easily grown plant, it does well in a heavy cold damp soil but thrives best on moist well-drained, fine sandy loams or silts close to streams. Prefers a deep rich well-drained circumneutral soil, growing best in the south and east of Britain. Growth is much less on wet soils, on poor acid soils and on thin dry soils]. It does not do well in exposed upland sites. It dislikes shade and is intolerant of root or branch competition. Tolerates both hot and cool summers. Fairly wind-tolerant. The tree is reported to tolerate an annual precipitation in the range of 60 to 150cm, an annual temperature in the range of 8 to 14°C, and a pH of 4.5 to 8. A fast-growing but short-lived tree. It can make new shoots up to 1.5 metres long each year and is often planted for timber in Europe. It does have drawbacks, though, since it is easily storm-damaged, is easily damaged by fire when young and is much attacked by fungi. Like the quaking aspen (Populus tremuloides) the leaves of this species rustle even in light breezes. The trees can be coppiced, sprouting freely from the base of the trunk and the roots if they are cut down. Poplars have very extensive and aggressive root systems that can invade and damage drainage systems. Especially when grown on clay soils, they should not be planted within 12 metres of buildings since the root system can damage the building’s foundations by drying out the soil. Dioecious. Male and female plants must be grown if seed is required. Hybridizes freely with other members of this genus. Special Features: North American native, Naturalizing, Wetlands plant, Inconspicuous flowers or blooms.

Propagation :
Seed – must be sown as soon as it is ripe in spring. Poplar seed has an extremely short period of viability and needs to be sown within a few days of ripening. Surface sow or just lightly cover the seed in trays in a cold frame. Prick out the seedlings into individual pots when they are large enough to handle and grow them on in the old frame. If sufficient growth is made, it might be possible to plant them out in late summer into their permanent positions, otherwise keep them in the cold frame until the following late spring and then plant them out. Most poplar species hybridize freely with each other, so the seed may not come true unless it is collected from the wild in areas with no other poplar species growing. Cuttings of mature wood of the current season’s growth, 20 – 40cm long, November/December in a sheltered outdoor bed or direct into their permanent positions. Very easy. Suckers in early spring.
Edible Uses:……Inner bark .….. A mucilaginous texture, it is usually harvested in the spring. The inner bark is often dried, ground into a powder and then used as a thickener in soups etc or added to cereals when making bread. Seeds. No more details are given but they are very small and would be exceedingly fiddly to collect and use. Sap – used for food. Buds. The leaves are rich in protein and have a greater amino-acid content than wheat, corn, rice and barley. A concentrate made from them is as nourishing as meat, but can be produced faster and more cheaply. Some people believe that this will become a major food source for humans.
Medicinal Uses:
Anodyne; Anthelmintic; Antiinflammatory; Antiscorbutic; Blood purifier; Febrifuge; Poultice; Tonic.

The bark contains salicin, a glycoside that probably decomposes into salicylic acid (aspirin) in the body. The bark is therefore anodyne, anti-inflammatory and febrifuge. It is used especially in treating rheumatism and fevers, and also to relieve the pain of menstrual cramps. An infusion of the bark has been used in the treatment of whooping cough and tuberculosis. A decoction of the bark has been used to rid the body of intestinal worms. The bark has been eaten as a treatment for colds. A tea made from the inner bark is used in the treatment of scurvy. The inner bark, combined with black haw bark (Crataegus douglasii) and wild plum bark (Prunus spp) has been used as a female tonic. A poultice of the leaves has been used as a treatment for rheumatism, bruises, sores and boils.
Other Uses:
Biomass; Dye; Pioneer; Rooting hormone; Shelterbelt; Soil stabilization; Wood.

An extract of the shoots can be used as a rooting hormone for all types of cuttings. It is extracted by soaking the chopped up shoots in cold water for a day. Various dyes can be obtained from the leaf buds in the spring – green, white, yellow, purple and red have been mentioned. Trees are planted for dune fixing in erosion control programmes. They are also good pioneer species, growing quickly to provide a good habitat for other woodland trees and eventually being out-competed by those trees. A fairly wind resistant tree, it can be grown as part of a shelterbelt planting. Another report says that it is easily storm-damaged. The wood has been used as a bio-mass for producing methanol, which can be used to power internal combustion engines. Annual yields of 7 tonnes of oven-dry material per year have been achieved. Wood – weak, soft, rather woolly in texture, without smell or taste, of low flammability, not durable, very resistant to abrasion but warps and shrinks badly. It weighs 24lb per cubic foot. The wood takes paint well, is easy to glue and nail. It is used principally for lumber, pulp, crates, veneer etc.

Disclaimer : The information presented herein is intended for educational purposes only. Individual results may vary, and before using any supplement, it is always advisable to consult with your own health care provider.

Resources:
https://en.wikipedia.org/wiki/Populus_deltoides
http://www.pfaf.org/user/Plant.aspx?LatinName=Populus+deltoides

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