Festuca donax is a species of grass which can be found in Africa and Macaronesia.[1]
The plant is perennial and caespitose with 60– long culms that grow in a clump. The ligule is 3– long and is going around the eciliate membrane. Leaf-blades are 5– broad with scabrous margins. The panicle is elliptic, open, inflorescenced and is 18– long. Spikelets are elliptic, solitary, 5.5– long, and carry fertile ones which have 2–3 fertile florets that are diminished at the apex.[1]
The glumes are chartaceous, lanceolate, keelless, with acuminate apexes, with only difference is in size. The upper one is 5– long while the other one is 4.5– long. Fertile lemma is 4.4– long and is also chartaceous, ovate and keelless. Lemma itself is muticous with acute apex and scaberulous surface. Flowers have a hairy ovary and three stamens that are long. The fruits are caryopses with an additional pericarp, which just like flowers is hairy as well. Hilum is linear.[1]