{{Short description|Species of grass}} {{Speciesbox |image = |genus = Festuca |species = donax |authority = Lowe |synonyms = ''Drymochloa donax'' {{small|(Lowe) H.Scholz & Foggi}} |synonyms_ref = <ref name = powo>{{cite web |title=''Festuca donax'' Lowe |url=https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:402672-1 |website=Plants of the World Online |publisher=Royal Botanic Gardens, Kew |access-date=17 February 2025}}</ref> }}

'''''Festuca donax''''' is a species of grass. It is native to the Madeira archipelago in the Atlantic Ocean.<ref name = powo/>

==Description== The plant is perennial and caespitose with {{convert|60|–|120|cm}} long culms that grow in a clump. The ligule is {{convert|3|–|5|mm}} long and is going around the eciliate membrane. Leaf-blades are {{convert|5|–|10|cm}} broad with scabrous margins. The panicle is elliptic, open, inflorescenced and is {{convert|18|–|30|cm}} long. Spikelets are elliptic, solitary, {{convert|5.5|–|6.5|mm}} long, and carry fertile ones which have 2–3 fertile florets that are diminished at the apex.<ref name=kew>{{cite web|url= https://www.kew.org/data/grasses-db/www/imp04533.htm|author1=W.D. Clayton |author2=M. Vorontsova |author3=K.T. Harman |author4=H. Williamson |title=Festuca donax|publisher= GrassBase|work=The Board of Trustees and Royal Botanic Gardens|place=Kew|date=November 16, 2012|accessdate=December 6, 2013}}</ref>

The glumes are chartaceous, lanceolate, keelless, with acuminate apexes, with only difference is in size. The upper one is {{convert|5|–|6.2|mm}} long while the other one is {{convert|4.5|–|5.3|mm}} long. Fertile lemma is {{convert|4.4|–|5.2|mm}} 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 {{convert|3|mm}} long. The fruits are caryopses with an additional pericarp, which just like flowers is hairy as well. Hilum is linear.<ref name=kew/>

==References== {{Reflist}}

{{Taxonbar|from=Q15298413}}

donax Category:Endemic flora of Madeira Category:Plants described in 1831

{{Festuca-stub}}