diff --git a/xarray/plot/facetgrid.py b/xarray/plot/facetgrid.py
index 73b1e88d085..9175e46de62 100644
--- a/xarray/plot/facetgrid.py
+++ b/xarray/plot/facetgrid.py
@@ -495,7 +495,7 @@ def map_plot1d(
         if self._single_group:
             full = tuple(
                 {self._single_group: v}
-                for v in range(0, self.data[self._single_group].size)
+                for v in range(self.data[self._single_group].size)
             )
             empty = (None,) * (self._nrow * self._ncol - len(full))
             name_d = full + empty