2.2 Morphological observation
Morphological features including underground rhizomes, stalks, cauline
internodes, leaf auricles and blades, glumes, lemmas, paleas, awns, and
anthers were observed. At least 20 measurements on fresh material were
performed on each morphological variable by using a stereomicroscope
(Olympus SZX7, Tokyo, Japan) with a digital camera.