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![Brandvikneset](https://www.grind.no/sites/default/files/styles/medium/public/bilder/sted/232/stord_18.jpg?itok=kdiECMrN)
![Spring in the black alder forest of Hystadsmarkjo.](https://www.grind.no/sites/default/files/styles/medium/public/bilder/sted/232/stord_8.jpg?itok=uKjQ61DI)
Hystad- the black alder forest
One of the biggest black alder forests in the country is in Hystadmarkjo. Along the well prepared trail through the forest you can experience an exceptional nature with an unusual abundance of exuberant plant species. But what has laid the foundation for this richness?
![The limestone quarry on the east side of Storsøya Island](https://www.grind.no/sites/default/files/styles/medium/public/bilder/sted/232/stord_49.jpg?itok=X-nbnmTq)
Storsøya Island
On Storsøya Island, English ivy grows nearly everywhere. It creeps along the ground and climbs all the way to the top of the tree trunks. Together with holly, the trees of juniper, yew and an unusual pine forest keep the island green the whole year 'round.
![Lake Tveitavatnet](https://www.grind.no/sites/default/files/styles/medium/public/bilder/sted/232/stord_42.jpg?itok=AqtnVja2)
Tveitavatnet
It is difficult to imagine that a plant can grow at the same place for many thousands of years: Climate and local environment change. Different species grow up and die out. Nonetheless, some plants get established, but don't manage to spread into new areas, because the climate is at the edge of what they can tolerate. Great fen-sedge is just such a plant.
![Baldellia](https://www.grind.no/sites/default/files/styles/medium/public/bilder/sted/232/stord_30.jpg?itok=cgEojqGU)
Ådlandsvatnet
Plants that grow in and beside water have to be prepared for marked and rapid changes in their living conditions. They must be able to tolerate living under water without drowning, and getting totally dried out without whithering. Many swamp plants are well adapted to these kinds of changes.
![Fadnesskaret](https://www.grind.no/sites/default/files/styles/medium/public/bilder/sted/232/voss_17.jpg?itok=DJXiHJma)
![Old pine forest in Husedalen.](https://www.grind.no/sites/default/files/styles/medium/public/bilder/sted/232/ull_16.jpg?itok=gBADAIFF)
![From Kinsekvelven river toward Lakes Kinsevatnet and Veivatnet.](https://www.grind.no/sites/default/files/styles/medium/public/bilder/sted/232/ull_25.jpg?itok=-w2m_QOH)
Veivatnet
From Kinsekvelven river and inward to Lake Veivatnet, we can wander through one of Hardangervidda's many fertile areas. A number of finicky plants grow here, and there are plenty of birds and fish. We can thank a lime rich soil for the diversity.