Leaves sessile , subulate to linear , always persistent , margin narrowly membranous , apex aristate .

叶无柄，钻形的到线形，总是宿存，边缘狭膜质，先端具芒。

Perianth segment apex acicular , together connivent and forming a cone , rarely apex membranous and thinly long aristate .

花被片顶针状的，靠合和形成的一圆锥，很少的先端膜的薄具长芒的。