Table 1.

Morphological comparisons of S. dakrongense with S. hainanense.

Characters	S. dakrongense	S. hainanense
Culm	6−8 m tall, ca. 1.5 cm in diameter	8−20(−30) m tall, ca. 4 cm in diameter
Internodes	ca. 40 cm long	75 cm long or more
sheath blade	usually less than half as long as sheath	usually more than half as long as sheath
Base of culm sheath outer margin	With a slight projection below point of attachment	With a conspicuous semi-circular projection below point of attachment
Leaf abaxial surface	pale-puberulent and sparsely pilosulous	glabrous
Bracts	(5−)6	3−4
Rachilla terminal segment	margin ciliate	glabrous