Table 2.

Morphological comparison of Fargesianana, F.fractiflexa and Yushaniapolytricha.

Characters	F.nana	F.fractiflexa	Yushaniapolytricha
Rhizome	culm-neck 4~8 cm long, 0.6~0.8 cm in diameter	culm-neck 3~20 cm long, 0.7~2 cm in diameter	culm-neck 13~40 cm long, 0.3~0.8 cm in diameter
Culm height	1.5~2.2 m	2~3(4.5) m	1~2 m
Culm diameter	0.2~0.4(0.6) cm	0.6~1.2 cm	0.3~0.8 cm
Internode length	10~19(22) cm	12~15(20) cm	13~25(37) cm
Branch complement	10~20(30)	5~17	1~5
Culm bud	semi-orbicular	semi-orbicular	long-ovate
Culm leaf sheath	caducous, papery, 1/3 to 1/2 as long as internodes	caducous or persistent, thinly coriaceous, longer than internodes	caducous, cartilaginous, 2/3 as long as internodes
Culm leaf ligule length	ca. 2 mm	ca. 1~3 mm	ca. 1 mm
Culm blade size	Linear-triangular, 0.4~2 cm long, 0.8~1.7 cm wide	Linear-lanceolate, 2~8 cm long, 1~1.5 mm wide	Linear-lanceolate, 1~3 cm long, ca. 2 mm wide
Auricle	Absent	Absent	Falcate auricles with margins
Foliage leaf size	length 5~7 cm, width 5~7.5 mm, sparsely gray-pilose upper surface when young	length 7~13 cm, width 0.5~1.2 cm, glabrous	length 9~21 cm, width 1.2~2.5 cm, abaxially grayish-white pubescent.
Foliage leaf sheath length	length 1.8~2.2 cm	length 2~3 cm	length 5.5~10 cm
Foliage leaf ligule length	ca. 1 mm	ca. 1~1.5 mm	ca. 1 mm
Petiole length	ca. 2~3 mm	ca. 1~2 mm	ca. 3~4 mm
Transverse veins on foliage leaf blade	Conspicuous	obscure	obscure
Distribution	Yunnan: Wuding county, Jiyi town, 1895~1926 m	Southwestern Sichuan, northeastern to northwestern Yunnan, 1380~3200 m	Central to western Yunnan, 1900~1950 m