Elymus buschianus

Description

HABIT Perennial;caespitose;clumped densely.Culms erect,or geniculately ascending;45–80 cm long.Culm-internodes distally pruinose.Ligule an eciliate membrane.Leaf-blades flat,or convolute;10–20 cm long;3–6 mm wide.Leaf-blade surface scaberulous;rough adaxially.Leaf-blade margins scaberulous.Leaf-blade apex acuminate.INFLORESCENCE Inflorescence composed of racemes.Racemes 1;single;bilateral;8–17 cm long.Rhachis flattened;scabrous on margins.Spikelet packing broadside to rhachis;crowded.Rhachis internodes linear;10–15 mm long.Rhachis internode tip flat.Spikelets solitary.Fertile spikelets sessile.FERTILE SPIKELETS Spikelets comprising 3–5 fertile florets;with diminished florets at the apex.Spikelets elliptic to oblong;laterally compressed;11–20 mm long;breaking up at maturity;disarticulating below each fertile floret.GLUMES Glumes collateral;persistent;similar;shorter than spikelet.Lower glume lanceolate;7–10 mm long;1 length of upper glume;coriaceous;without keels;5–7 -veined.Lower glume surface scabrous;rough on veins.Lower glume apex dentate;2–3 -fid;muticous,or mucronate.Upper glume lanceolate;7–10 mm long;1 length of adjacent fertile lemma;coriaceous;without keels;5–7 -veined.Upper glume surface scabrous;rough on veins.Upper glume apex dentate;2–3 -fid;muticous,or mucronate.FLORETS Fertile lemma lanceolate,or elliptic;8–10 mm long;coriaceous;5 -veined.Lemma surface pubescent.Lemma apex dentate;2 -fid;mucronate.Palea keels scabrous.Apical sterile florets resembling fertile though underdeveloped.FLOWER Lodicules 2;membranous.Anthers 3.Stigmas 2.Ovary pubescent on apex.FRUIT Caryopsis with adherent pericarp.