Never too old to learn

Parcels/plots in Germany, especially outside cities/villages, often have a name. Actually, the German word "Flurstück" means a named piece of land.
Our parcel only has a number.
In the forests you can often see trees, especially on crossings of two or more paths, with a little sign with number and name. In general the names are clear. But today I saw this one and had no idea what it meant. What did this mean, "in the second parcel-something"?
At home I tried Mr Google and got very few hits. But one good one here. It says, in German: 'grassy slope, steep slope, embankment, sloping piece of land or path'. Obviously it means the same as the German word "Rain", with the difference that Rech is used in parcel names.

(PS: I assume the people in our part of Hessia pronounce it Resch.)