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 fourth glume is as long as the third, ovate, obtuse, paleate.
The first glume is shorter than the second, ovate, obtuse, 7- to 9-nerved.
The second glume is somewhat ...