Complex sentence: The leaf sheath is glabrous or pubescent with hairs which are more-or-less appressed; the lower part of the leaf blade is similar, the upper part is scaly.
Split into simpler sentences: The leaf sheath is smooth (glabrous) or hairy (pubescent), with hairs which are more-or-less bent over (appressed). The lower part of the leaf blade is similar; the upper part is scaly.