Review of the species concepts Chara fibrosa and C. flaccida (Characeae, Charophyceae)

Taxonomic circumscriptions of the charophyte taxa Chara fibrosa C.Agardh ex Bruzelius. and C. flaccida var. wightii A.Braun are revised, and both taxa are recognised at species rank, as C. fibrosa and C. wightii (A.Braun) Casanova. Both species are illustrated and a review of relevant morphological characters is also presented.C