Complex sentence: The leaves are up to 15 cm long and 0.5 to 2.5 cm wide, with shallowly waved edges, which distinguish it from the closely related Carolina Horsenettle ("S. carolinense"), which has wider, more deeply indented leaves.
Split into simpler sentences: The leaves are up to 15 cm long and usually only 0.5 to 2.5 cm wide, with shallowly waved edges. This is one of the marks distinguishing it from the closely related Carolina Horsenettle ("S. carolinense"), which has wider, more deeply indented leaves.