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

1. Hymenachne patens L. Liu, Bot. Res. Acad. Sin. 4: 35. 1989.

展穗膜稃草 zhan sui mo fu cao

Culms decumbent, ascending to ca. 50 cm, nodes 4 or 5, villous. Leaf blades linear-lanceolate, 10–20 × 0.5–1 cm, glabrous on both surfaces, base rounded and clasping, apex acuminate. Panicle 15–20 × 4–9 cm, open; branches 5–12 cm, distant, laxly ascending, spikelets on side branchlets, 2 or 3 per node; pedicels 1–2 mm, smooth. Spikelets green or brownish green, 3.2–4 × ca. 1 mm, acute; lower glume 1/3–1/2 as long as spikelet, 3–5-veined; upper glume subequal to spikelet, herbaceous with membranous margins, 5-veined, acute; lower lemma similar to upper glume but slightly longer; upper lemma slightly shorter than spikelet, thinly cartilaginous, smooth, margins flat below middle, apex acute. Anthers ca. 1 mm. Fl. and fr. Jun–Oct.

* Wet field margins; ca. 100 m. Anhui, Fujian, Jiangxi.

The open panicle and villous nodes are very unusual in Hyme-nachne, but the spikelets are typical of the genus.


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