Panicum watense Mez.
Annuals; culm geniculate at base, 20-40 cm tall. Blade glabrous, 2-3 mm wide; sheath loose, ciliate
on margins; ligule short, membranaceous, ca. 1 mm long, with a ciliated apex. Panicle spreading, reddish,
ovoid, less than 9 cm long, branches capillary. Spikelets lanceolate, acute, ca. 1.7 mm long, glabrous;
lower glume acute, more than 1/2 as long as spikelet, 3-veined; upper glume and lower lemma
equal in length, 5-veined; upper lemma shorter than spikelet, ca. 1.2 mm long, greyish, obtuse, shiny,
HSINCHU: Suzuki s. n. NANTOU: Chingshuikou, Huang s. n. PINGTUNG: Kenting, Suzuki 12528; Ssuchungchi,
Tropical Africa, Madagascar, India, Sri Lanka, Indochina, Malesia and southern China. Taiwan, at
low elevation in tea plantations, dry fields and open waste places.