F. rubra may refer to: Festuca rubra, the red fescue, a grass species found worldwide Filipendula rubra, the queen-of-the-prairie, a medicinal and ornamental plant species native to the United States Foudia rubra, the Mauritius fody, a bird species endemic to the island of Mauritius
Synonyms Frangula rubra, a synonym for Rhamnus rubra, the red buckthorn, a flowering plant species