Plants with stems, basal sheaths and leaves smooth or slightly longitudinally striate (mainly in dried specimens). No ridges in outline of transverse section of stems and leaves, with all epidermal cells (1–) 1.5–2 times as long as wide. 2n = 40, fide S.Snogerup, in Ö.Nilsson & S.Snogerup, Bot. Not. 125: 131 (1972); M.Zandee, Proc. Kon. Ned. Akad. Wetensch., C, 84: 250 (1981).