Styles short;stigmas capitate.Utricles irregularly circumscissile (bursting).

花头头状不规则的胞果周裂的(爆发)。

Utricles convex on both sides; rostra nearly equal to length of kernel; seed free from pericarp; leaves and bracts acicular to spinulose at apex.

胞果凸的面；喙差不多等于珠心的长度；种子离生的果；微刺的在先端针状的叶和苞片。