Complex sentence: The small spoon to lance-shaped leaves are reddish at the base with the upper leaves concave and the lower convex; they are 2.8--4.2 mm long and 1.1--1.5 mm wide.
Split into simpler sentences: The small spoon to lance-shaped leaves are reddish at the base with the upper leaves concave and the lower convex. They are 2.8--4.2 mm long and 1.1--1.5 mm wide.