Juncus quartinianus (Juncaceae, sect. Ozophyllum): A Neglected Species from the Horn of Africa and Its Re-Description Based on Morphological SEM Studies

Juncus quartinianus (Juncaceae sect. Ozophyllum ) was described by Richard in 1851 from Ethiopia. Some authors have treated this species as a synonym of J . fontanesii and others as a synonym of J . oxycarpus . Based on morphological analyses of flowers, fruit and seeds, we propose to restore J . quartinianus as a distinct species from both these taxa. Its detailed re-description and an identification key to the morphologically similar species of Juncus sect. Ozophyllum are provided.