Elymus yushuensis (Elymus yushuensis)
Description
Culms erect,45–60 cm tall,1–2 mm in diam.,2- or 3-noded,glabrous.Leaf sheath glabrous;ligule very short,apex truncate;leaf blade usually involute,5–9 cm,abaxial surface glabrous,adaxial surface and margin pilose.Spike lax,6–11 cm;rachis slender,glabrous;internodes 7–18 mm,or to 30 mm at base of spike.Spikelets 1 per node,usually purplish,12–20 mm,with 4–6 florets;rachilla pubescent.Glumes lanceolate,3–5-veined,glabrous,apex pungent;proximal glume 4–5 mm;distal glume 6–7 mm.Lemma oblong-lanceolate,abaxially spinescent;first lemma 8–9 mm;awn 2–4 mm.Palea slightly shorter than or equaling lemma,ciliolate along keels distally,apex truncate.Caryopsis yellowish,apex pubescent.Fl.and fr.Aug–Sep.
Taxonomic tree
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Domain: Eukarya
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Kingdom: Plantae
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Phylum:
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Class: Liliopsida
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Order: Poales
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Family: Poaceae
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Genus: Elymus
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