Hyparrhenia is a genus of grasses. Many species are known commonly as thatching grass. They are mostly native to tropical Africa; some can be found in warmer areas in temperate Eurasia, Australia, and Latin America. These are annual and perennial bunch grasses. The inflorescence branches into twin spikes of paired spikelets. see Andropogon Elymandra Exotheca Hyperthelia Parahyparrhenia