Periballia involucrata (Cav.) Janka [ Aira involucrata Cav.]
      
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6 769127 Periballia involucrata (Cav.) Janka [125 34658 Aira involucrata Cav.] Gramineae
G.A. da Silva Ferreira Sampaio, Iconogr. Select. Fl. Portug. : t. 20 (1949-1950)