Heteropogon
Annual or Perennial. Caepitose. Leaf-Blades linear. Ligule a fring of hairs or ciliolate membrane. Inflorescence spike-like raceme. Spikelets appressed; in pairs. Fertile spikelets sessile; 1 in the cluster, or 2 in the cluster. Companion sterile spikelets pedicelled; 1 in the cluster. Basal sterile spikelets well-developed.Companion sterile spikelets well-developed; separately deciduous; callus linear; glumes muticous. Fertile spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets linear; subterete; falling entire; deciduous with accessory branch structures; callus linear; bearded; base pungent; attached obliquely. Glumes exceeding apex of florets; firmer than fertile lemma. Lower glume linear, elliptic, oblong; coriaceous; without keels; 7–9 -veined. Lower glume surface convex or grooved on either side of midvein; puberulous, pubescent, pilose or hispidulous. Lower glume apex truncate or obtuse. Upper glume linear; coriaceous; with undifferentiated or membranous margins; without keels; wingless or winged on margins; 3 -veined. Upper glume surface glabrous, puberulous or pubescent. Basal sterile florets barren; without significant palea. Lemma of lower sterile floret linear, lanceolate or elliptic; 1 length of fertile lemma; hyaline; 0 or 2 -veined. Fertile lemma linear or oblong; membranous; wingless; 1 or 3 -veined. Lemma surface unwrinkled; without grooves. Lemma apex 1 -awned. Principal lemma awn geniculate. Column of lemma awn pubescent or hirtellous. Palea present, absent or minute; 0.2–0.3 length of lemma. Anthers 3. Stigmas 2. [1]