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The vegetation of Swedish lakes 39Fig. 13. Lake Storsjon, province of Harjedalen; lat. 62° 50'; a1t. 565 m; area 29 sq. km. The river Ljungan flows throughthe lake. The picture gives a view of the western end of the lake before it became a reservoir. Wide stands of Equisetumjluviatile mark an earlier course of the river into the lake. The lake harboured 26 species of vascular plants. Aug. 18,1958. Photo G. Lohammar.Fig. 14. Lake Ann. The vast delta of the main influent is largely covered with luxuriant stands of Carex aquatilis,here at their outer border mixed with fine stands of Eleocharis palustris. Outside these stands there are wide, veryshallow wat6r regions with a sparse vegetation of P{)tamogeton Jiliformis, P. perjoliatus, Eleocharis acicula1·is and smallsterile specimens of Sparganium cf. angustijolium. No less than 32 vascular aquatics have been observed in this lake.Aug. 24, 1964. Photo G. Lohammar..Acta Phytogeogr. Suec. 50