Borovichev E.A. Botanical excursion on the Northern Soroya. Hammerfest, 2014.

White Clover (Trifolium repens) was introduced as a pasture crop and occurs now in various disturbed habitats, oftenforming extensive creeping mats millefolium) and Tufted Hair-grass ( Deschampsia caespitosa) were reported as possible plants often found around Lapp huts and spread by reindeer along their trails. With beginning o f farms and villages on Seraya in 19-20 century also came cattle herding and keeping, and a considerable number of weedy plants. Winter forage for the cattle was cut mainly from natural grassland, but weeds were introduced w'ith cattle grain and hay from the mainland. Tufted Fetch ( Vicia cracca). White Clover ( Trifolium repens), Orchard Grass (Dactylis glomerata ), Meadow Vetchling ( Lathyrus pratensis) and Sneezewort ( Achillea ptarmica) probably have been spread together with hay seeds. The climate o f northern Norway is unfavorable for cultivation o f most crops. But cultivation of hay is regarded as a widely distributed technique o f grasslands improvement in the north of Fennoscandia. Such grasses as Red Clover (Trifolium pratense) and Meadow Fescue (Festuca pratensis) have probably originated from cultivated forage crop. Cultivation o f vegetables and berries is rather common in villages and farms o f Sariaya. Black and Red Currants (Ribes nigrum and Ribes spicatum), Strawberry ( Fragaria x ananassa) and Rhubarb ( Rheum rhabarbavum) are common in kitchen-gardens o f northern Ssraya. Gardening of ornamental plants is very popular everywhere in northern Norway: there Red Clover (Trifolium pratense) grows on subalpine and shore meadows ofthe island. It was introducedas a cattleforage, valuedfor its nutritionalproperties and ability to increase soilfertility are gardens around almost every village and farm houses. The gardens contain trees, shrubs, and perennial and annual ornamental herbs, which occasionally escape into natural habitats. The practice o f gardening, with the resulting movement of seeds, seedlings of introduced plants and soil facilitated immigration o f weeds, such as Stinging Nettle (Urtica dioica) and Common Chickweed (Stellaria media) growing on moist nitrogen-rich soils around S»raya settlements. The latter species grows abundantly on bunches of seaweed on the shore o f some bays. Some species of Hogweed (Heracleum spp.) are considered to have been introduced to northern Norway in the middle o f XIX century photo S. Nativeplant Bird's-foot Trefoil (Lotus corniculatus) takes advantagefrom grazing, because it is light- loving and notpreferential grassforfeeding. It gets abundant and spreads more and more in grazed areas 76