KANNUBJØLLUVÍSA TIL MATNA 47 in 1997. Tea of the field horsetail is recom- mended for giving energy and strength, as well as a diuretic. It is also said to stimulate sexual lust, which might contribute to its popularity (Nilsson, 1975: 96; Ingmansson, 1996: 248). According to the Scottish botanist Lightfoot (1789: 647) it was more- over once »... esteem'd serviceable in the [...] Gonorrhæa, but is out of the present practice.« Curiously enough, people of northern India still use crushed plants of the related E. debile with a little quantity of water until a thick paste is formed. The paste is then orally applied for the treat- ment of gonorrhoea (Rai et al., 1993: 194). The medicinal uses of field horsetail are known in the folk tradition from its whole distribution area, including Europe, North America and Malaysia (Høeg, 1974; Brøn- degaard, 1978; May, 1978: 513). If we just take the Indians of North America as exam- ple, they used various parts of the plant in their healing systems. Iroquois made tea from the roots when infants were teething; Ojibwa ordinated tea from the whole plant for dropsy and a stem decoction was used against painful urination. Among the Indi- ans in California ashes from the roots were used on sore moufh (May, 1978: 513; Ar- nason etal, 1981: 2267). Other species have been used as medici- nal plants as well. Costanoan Indians in California used a decoction of E. laeviga- tum as contraceptive, for bladder ailments, for delayed menstruation, and as hair wash (Bocek, 1984: 247). The Washington Indi- ans used the rough horsetail (Equisetum hy- menale) for eye wash. Blackfoot Indians used it in horse medicine and Cree includ- ed it in a medicine to correct menstrual reg- ulations (Johnston, 1970: 304). In Califor- nia the Indians made a hot infusion drink of E. kansanum for backache and in South Africa Suto women drank a decoction of the rhizome from the branched horsetail (Equisetum ramosissimum) to facilitate fer- tilization. The powdered stem in water could be used for an upset stomach. Peru- vians treated acne and ulcers with E. xy- lochaetum and used it as a diuretic (May, 1978: 513). Bergvall (1972) has recorded from Edsele in Angermanland, northern Sweden, how E. scirpoides was gathered during the late summer and used for various veterinary medicine for cattle and horses. Used as fodder E. arvense seems to have been regarded as bad fodder for sheep and cattle in some places. It has even been regarded as harm- ful to the animals, while it is said not to af- fect the animals in other areas. E.g. Montin (1749: 62) asserts that E. arvense is harm- ful for the foetus of sheep and leads to pre- mature delivery. Linnæus (1755) reports the same about E. hyemale. Furthermore he says that the cattle usually do not eat E. ar- vense, although he mentions the case of the cattle in Friesland who, due to hunger, ac- tually grazed on it. E. hyemale is regarded as excellent fodder for horses by Linnæus, and E.fluviatile is eaten by cattle, who pro- duce more milk after eating it, and also eat- en by reindeer. His younger colleague Lil- jeblad (1798: 383-384), with references to various local traditions, is sceptical also of most species of Equisetum as fodder and according to him they all seem to be harm-