Vegetative branches with 2-4 leaves; sheath 2-10 cm long, margin membranous, auricle obtuse; leaf blade 5-35 cm long, 1-2 mm wide, apex obtuse or slightly emarginated; primary veins 3, parallel.

• 营养枝具叶2-4枚；叶鞘长2-10厘米，边缘膜质，叶耳钝圆；叶片长5-35厘米，宽1-2毫米，先端钝或微凹；初级脉3条，平行。