Complex sentence: The basal and cauline leaves have one nerve, and the leaves are long and thin, ranging from 6 to 20 + centimeters long and 3 to 8 millimeters wide.
Split into simpler sentences: The basal and cauline leaves have one nerve. The leaves are long and thin, ranging from 6 to 20 + centimeters long and 3 to 8 millimeters wide.