The Slope of Luknė Stream. Luknė is the left tributary of Dubysa river. The source of it is in Praviršulis raised bog. The length of the stream is 33 km. The wide Dubysa erosional valley, with pronounced erosional valleys of left tributaries and finely seamed with ravines, are protected in Luknė geomorphological reserve. This reserve is also rich with the grassland habitats.