What is "megastachya"

Megastachya is a genus of African plants in the grass family.

1. Megastachya madagascariensis (Lam.) Chase - Madagascar
2. Megastachya mucronata (Poir.) P.Beauv. - Madagascar, South Africa, Cameroon, Ethiopia, Central African Republic, Gabon, Kenya, Malawi, Zambia, Tanzania, etc.

numerous species once regarded as part of Megastachya but now considered better suited to other genera: Catapodium Desmostachya Distichlis Enteropogon Eragrostis Glyceria Halopyrum Leptochloa Poa