Botanical Name : Equisetum hyemale
Species: E. hyemale
Common Name : Dutch Rush, Scouringrush horsetail, Horsetail, Scouring Rush, Rough Horsetai
Habitat : Equisetum hyemale is a native plant throughout the Holarctic Kingdom, found in North America, Europe, and northern Asia. It grows in mesic (reliably moist) habitats, often in sandy or gravelly areas between sea level to 2,530 metres (8,300 ft) in elevation, to 500 metres.
It is primarily found in wetlands, and in riparian zones of rivers and streams where it can withstand seasonal flooding. It is also found around springs and seeps, and can indicate their presence when not flowing. Other habitats include moist forest and woodland openings, lake and pond shores, ditches, and marshes and swamps.
Equisetum hyemale is a perennial plant, growing to 1 m (3ft 3in).Bloom Color: Unknown. Main Bloom Time: Early spring, Late spring, Mid spring. Equisetum species – horsetail family are Creeping, perenial, Branching rootstocks, rooted at the nodes. The Arial stems may be annual or Perennial, are cylindrical, fluted, simple or with whorled branches at the jointed nodes. The internodes are usually hollow. The Surfaces of the stems are covered with Silica. The Cones are terminal. Form: Spreading or horizontal, Upright or erect, Variable spread.
It is hardy to zone (UK) 5. The seeds ripen from Jul to August.
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Equisetum hyemale has vertical jointed reed-like stalks of medium to dark green. The hollow stems are up to 3 feet (0.91 m) in height. The stems are not branched with conspicuous ridges, impregnated with silica which makes them feel rough and harsh.
The tiny leaves are joined together around the stem, forming a narrow black-green band or sheath at each joint. Like other ferns and their relatives, the plant reproduces by spores and does not produce flowers or seeds.
The stems are generally deciduous in cold climates, and remain during winter in warmer climates. It forms dense spreading colonies, in full to partial sun.
Equisetum hyemale subsp. affine — endemic to North America
Landscape Uses:Container, Ground cover, Woodland garden. Prefers a moist soil with a pH between 6.5 and 7.5. Plants are hardy to about -30°c. The stems of this species were once exported to Britain in quantity from Holland so that they could be used as an abrasive for cleaning pots and pans. Plants have a deep and penetrating root system and can be invasive. If grown in the garden they are best kept in bounds by planting them in a large container which can be sunk into the ground. Special Features:North American native, Invasive, Naturalizing, Wetlands plant.
Spores – best collected as soon as they are ripe in the spring and surface-sown immediately on a sterile compost. Keep moist and pot up as soon as the plants are large enough to handle. Very difficult. Division. The plants usually spread very freely when well sited and should not really need any assistance
Strobil (the fertile shoots in spring) – cooked. An asparagus substitute. Caution is advised, see the notes above on toxicity. Roots – dried and then cooked. A source of starch. Caution is advised, see the notes above on toxicity. A further report says that the peeled stems, base of the plant, root and tubers were eaten raw by the N. American Indians, the report went on to say that this may be inadvisable.
Antibacterial; Antiinflammatory; Antispasmodic; Appetizer; Cancer; Diaphoretic; Diuretic; Expectorant; Febrifuge; Hypotensive; Parasiticide;
Horsetails have an unusual chemistry compared to most other plants. They are rich in silica, contain several alkaloids (including nicotine) and various minerals. The plant is anticancer, anti-inflammatory, antispasmodic, diaphoretic, diuretic, expectorant, febrifuge, haemostatic, hypotensive and styptic. It also has an appetite-stimulating effect. The barren stems are used, they are most active when fresh but can also be dried and sometimes the ashes of the pant are used. The plant is a useful diuretic when taken internally and is used in the treatment of kidney and bladder problems. A decoction applied externally will stop the bleeding of wounds and promote healing. The plant contains polyphenolic flavonoids with bactericidal activity.
Some Plateau Indian tribes boiled the stalks to produce a drink used as a diuretic and to treat venereal disease. It is used as a homeopathic remedy.
Dye; Fungicide; Liquid feed; Musical; Paper; Parasiticide; Polish; Sandpaper; Scourer.
The stems are very rich in silica. They are used for scouring and polishing metal and as a fine sandpaper. The stems are first bleached by repeated wetting and drying in the sun. They can also be used as a polish for wooden floors and furniture. The infused stem is an effective fungicide against mildew, mint rust and blackspot on roses. It also makes a good liquid feed. Used as a hair rinse it can eliminate fleas, lice and mites. A light pink dye is obtained from the stem. The hollow stems have been used as whistles. Another report says that the stem joints are pulled apart and used by children to produce a whistling sound.
The rough stems have been used to scour or clean pots, and used as sandpaper.
Boiled and dried Equisetum hyemale is used as traditional polishing material, similar to a fine grit sandpaper, in Japan.
Music : The stems are used to shape the reeds of reed instruments such as clarinets or saxophones.
Known Hazards :Large quantities of the plant can be toxic. This is because it contains the enzyme thiaminase, a substance that can rob the body of the vitamin B complex. In small quantities this enzyme will do no harm to people eating an adequate diet that is rich in vitamin B, though large quantities can cause severe health problems. The enzyme is destroyed by heat or thorough drying, so cooking the plant will remove the thiaminase. The plant also contains equisetic acid – see the notes on medicinal uses for more information.