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FOC | Family List | FOC Vol. 22 | Poaceae | Spodiopogon

8. Spodiopogon sibiricus Trinius, Fund. Agrost. 192. 1820.

大油芒 da you mang

Perennial, with spreading scaly rhizomes. Culms solitary, erect, 70–200 cm tall, 2–4 mm in diam., unbranched. Leaf sheaths glabrous; leaf blades linear-lanceolate, (10–)20–40 × 0.8–2 cm, glabrous or pubescent, base narrowed almost to midrib on lower blades, apex setaceously acuminate; ligule 1–2 mm. Panicle loosely contracted, narrowly lanceolate in outline, 10–20 cm; branches 2–6 cm, unbranched or lower branches branched once or twice, branchlets glabrous or pilose in axils; racemes 2–3-noded with 7–9 spikelets, disarticulating at maturity, one spikelet of a pair sessile, the other pedicellate; rachis internodes and pedicels 2.5–5 mm, slenderly clavate, ciliate, hairs 1.5–2 mm. Spikelets 4.5–6 mm; callus hairs 1.5–2.5 mm; lower glume broadly lanceolate, pilose with soft spreading hairs, veins smooth except near apex, apex acute or slightly emarginate, sometimes mucronate; upper glume acute or mucronate; lower floret staminate, palea well developed; upper lemma 2-lobed to lower 1/3; awn 10–15 mm. Anthers ca. 3 mm. Fl. and fr. summer–autumn. 2n = 40.

Mountain slopes, roadsides, forest margins; below 1100 m. Anhui, Gansu, Guangdong, Guizhou, Hainan, Hebei, Heilongjiang, Henan, Hubei, Hunan, Jiangsu, Jiangxi, Jilin, Liaoning, Nei Mongol, Ningxia, Shaanxi, Shanxi, Shandong, Sichuan, Zhejiang [Japan, Korea, Mongolia, Russia (Siberia)].

1 Spikelets 4.5–6 mm.   8a var. sibiricus
+ Spikelets 6.5–8 mm.   8b var. grandiflorus


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