The cap or head varies in form from rounded to ovate or cone shape.
Heart-shaped or cordate, similar to ovate, but with a notch at the base.
Obovate, same as ovate, but with the stem at the narrow end.
The first glume is shorter than the second, ovate, obtuse, 7- to 9-nerved.
The fourth glume is as long as the third, ovate, obtuse, paleate.
The second glume is somewhat ...