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

1. Eustachys tenera (J. Presl) A. Camus, Rev. Bot. Appl. Agric. Colon. 5: 208. 1925 [“tener”].

真穗草 zhen sui cao

Cynodon tener J. Presl in C. Presl, Reliq. Haenk. 1: 291. 1830; Chloris tenera (J. Presl) Scribner; Eustachys obtusifolia A. Camus.

Plant stoloniferous. Culms slender, in flabellate tufts along the rooting stolons, laterally compressed, 15–30 cm tall. Leaf sheaths strongly keeled, keel scabrous, overlapping at base; leaf blades broadly linear, flat or folded, 1.5–7 cm, 3–5 mm wide, midvein on abaxial surface and margins scabrous, apex obtuse; ligule ca. 1 mm. Racemes 3–6, 4–7 cm; rachis triquetrous, scab-rous on angles. Spikelets 1–1.2 mm, florets 2; glumes boat-shaped, keeled, scabrous on vein, ca. 1 mm; lower glume subacute; upper glume truncate, awn 0.3–0.5 mm; lemma of fertile floret broadly boat-shaped, ca. 1.2 mm, leathery, pilose along keel and incurving margins; palea obovate, narrower than lemma, keels scabrous; upper lemma much reduced, cuneate, lying within concave back of palea of fertile floret. Caryopsis brownish, plump, ca. 0.7 mm. Fl. and fr. Jun–Nov.

Grasslands, thickets, open weedy places, at low altitudes. Guangdong, Hainan, Taiwan [Indonesia, Malaysia, New Guinea, Philippines, Thailand, Vietnam].

This species is used as a lawn grass.


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