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Flowers large, solitary on long terminal peduncles, mostly 4-merous; corolla campanulate-funnel-form, its lobes usually fimbriate or erose, not crowned; a row of glands between the bases of the filaments.

The fourth glume is narrow, ciliate, nerveless or rarely 1-nerved, erose or bifid at the top.

The first glume is very short less than 1/5 inch, broadly oblong, nerveless, hyaline, broadly truncate and erose at the apex.

In some grasses it is a distinct membrane narrow or broad, with an even, truncate or erose margin, or finely ciliate.