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Fertile glumes coriaceous, cylindrical-involute and closely embracing the smaller palet and the cylindrical grain, having a long and twisted or tortuous simple awn jointed with its apex.

Border coriaceous, and set with bristles produced from three rows of tufts or pores.

The calyx is three-leaved; the corolla is large, composed of six petals — the three outer ones concave and coriaceous, and of a yellow colour; the three inner ones somewhat smaller and spherical.

Hilum a point; spikelets not laterally compressed. α Fertile glume and pale hyaline; empty glumes thick, membranous to coriaceous or cartilaginous, the lowest the largest.

The leaves he describes as having very short petioles, hearted at the base, and of a coriaceous consistence, and covered with large semi-globular glands.