Typha is a genus of about 30 species of monocotyledonous flowering plants in the family Typhaceae. These plants have a variety of common names, in British English bulrush or (mainly historically) reedmace, in American English cattail or punks, in Australia cumbungi or bulrush, in Canada bulrush or cattail, and in New Zealand raupō, bullrush, cattail, or reed.
The genus is largely distributed in the Northern Hemisphere, where it is found in a variety of wetland habitats. Although they can accumulate toxins in polluted areas, many parts of the plant are edible, including the starchy rhizomes.
Description
Typha are aquatic or semiaquatic, rhizomatous, herbaceous, perennial plants growing to in height. The leaves are long and narrow, up to wide,
Taxa
These species and hybrids are currently accepted:
Etymology
Typha is an ancient Greek name for the plant. It may be related to typhos (marsh).
Distribution and habitat
thumb|upright|[[Typha angustifolia at the edge of a reservoir in Croatia]]
thumb|upright|[[Typha latifolia in Japan]]
The most widespread species is Typha latifolia, which is distributed across the entire temperate Northern Hemisphere. It has also been introduced to Australia. T. angustifolia is nearly as widespread, but does not extend as far north; it may be introduced and invasive in North America. T. domingensis has a more southern American distribution and also occurs in Australia. T. orientalis is widespread in Asia, Australia, and New Zealand. T. laxmannii, T. minima, and T. shuttleworthii are largely restricted to Asia and southern Europe.
The plants grow in open swampy areas from sea level to .
Ecology
Typha species are often among the first wetland plants to colonize areas of newly exposed wet mud, with their abundant, wind-dispersed seeds. Buried seeds can survive in the soil for a long time. They germinate best with sunlight and fluctuating temperatures, which is typical of many wetland plants that regenerate on mud flats. The plants also spread by rhizomes, forming large, interconnected stands.
Typha species are considered to be dominant competitors in wetlands in many areas, and they often exclude other plants with their dense canopy. In the bays of the Great Lakes, for example, they are among the most abundant wetland plants. Different species of cattails are adapted to different water depths.
Well-developed aerenchymae make the plants tolerant of submersion. Even the dead stalks are capable of transmitting oxygen to the rooting zone.
Although Typha species are native wetland plants, they can be aggressive in their competition with other native species. They have been problematic in many regions in North America, from the Great Lakes to the Everglades. Control is difficult. The most successful strategy appears to be mowing or burning to remove the aerenchymous stalks, followed by prolonged flooding. Invasion, importantly, can be reduced or prevented by preserving water-level fluctuations, including periods of drought, and maintaining infertile conditions.
Potential toxicity
Some species are known to accumulate toxins and so must first undergo treatment before being eaten. Plants growing in polluted water can accumulate lead and pesticide residues in their rhizomes and should not be eaten.
Uses
Culinary
Many parts of Typha plants are edible to humans, with various parts being usable throughout the year. They can be processed into a flour with 266 kcal per 100 grams. They are fibrous and the starch must be scraped or sucked from the tough fibers.
Baby shoots emerging from the rhizomes, which are sometimes subterranean, can be picked and eaten raw. This food has been popular among the Cossacks in Ukraine and has been called "Cossack asparagus". The inner stalk of the leaf bases can be eaten raw or cooked, especially in late spring when they are young and tender.
Agriculture
The seeds have a high linoleic acid content and can be used to feed cattle and chickens. They can also be found cultivated in African countries such as Ghana.
Harvesting cattail removes nutrients from the wetland that would otherwise return via the decomposition of decaying plant matter. Floating mats of cattails remove nutrients from eutrophied bodies of freshwater.
Building material
For local native tribes around Lake Titicaca in Peru and Bolivia, Typha species were among the most important plants, and every part of the plant had multiple uses. For example, they were used to construct rafts and other boats.
Typha fluff can be used as thermal insulation in buildings as an organic alternative to conventional insulating materials such as glass wool or stone wool.
Paper
Typha stems and leaves can be used to make paper. It is strong with a heavy texture but hard to bleach, so it is not suitable for industrial production of graphical paper. In 1853, considerable amounts of cattail paper were produced in New York due to a shortage of raw materials. In 1948, French scientists tested methods for annual harvesting of the leaves. Because of the high cost, these methods were abandoned and no further research was done.
Fiber
Fibers up to long can be obtained from the stems when they are treated mechanically or chemically with sodium hydroxide. The stem fibers resemble jute and can be used to produce raw textiles. The leaf fibers can be used as an alternative to cotton and linen in clothing. The yield of leaf fiber is 30 to 40% and T. glauca can produce 7 to 10 tons per hectare annually.
Other
The seed hairs were used by some indigenous peoples of the Americas as tinder for starting fires. Some tribes also used Typha down to line moccasins and for bedding, diapers, baby powder, and cradleboards. One Native American word for Typha meant "fruit for papoose's bed". Typha down is still used in some areas to stuff clothing items and pillows. It can be dipped in wax or fat and then lit as a candle, the stem serving as a wick. Without the use of wax or fat, it will smolder slowly, somewhat like incense.<!-- , and may repel insects. -->
The flower stalks can be made into chopsticks. The leaves can be treated to weave into baskets, mats, or sandals.
The boiled rootstocks have been used as a diuretic for increasing urination, or mashed to make a jelly-like paste for sores, boils, wounds, burns, scabs, and smallpox pustules.
Cattail pollen is used as a banker source of food for predatory insects and mites (such as Amblyseius swirskii) in greenhouses.
The cattail, or as it is commonly referred to in the American Midwest, the sausage tail, has been the subject of multiple artist renditions, gaining popularity in the mid-20th century. The term sausage tail derives from the similarity that cattails have with sausages, a name given to the plant by the Midwest Polish community, which had noticed a similarity between the plant and kielbasa, a common Polish dish.