Description from Flora of China
Panicum munroanum Balansa, J. Bot. (Morot) 4: 140. 1890; Acroceras crassiapiculatum (Merrill) Alston; Panicum crassiapiculatum Merrill.
Perennial. Culms slender, long, creeping and rooting, the erect tips 15–40 cm tall. Leaf sheaths glabrous or one margin ciliate; leaf blades lanceolate, 3–7 × 0.4–0.9 cm, glabrous or sparsely pilose, base subcordate, margins glabrous, apex acuminate; ligule ca. 0.4 mm. Panicle 4–6 × 2–3 cm; racemes 3–6, short, erect, unbranched; spikelets on short pedicels along racemes and upper part of main axis, usually paired or single toward raceme apex. Spikelets ca. 4 mm, elliptic, stramineous when mature, subglabrous; lower glume broadly ovate, ca. 3.5 mm; upper glume and lower lemma similar, as long as spikelet, 5–7-veined, apex crested, slightly protruding; lower palea hyaline, narrow; upper lemma smooth, shining, 3–3.5 mm. Fl. and fr. Sep–Oct. 2n = 18.
Grassland on hill slopes, light shade of forest margins. Hainan [Cambodia, India, Indonesia, Malaysia, Myanmar, Philippines, Sri Lanka, Thailand, Vietnam].