Botanical name: Paspalidium flavidum    Family: Poaceae (Grass family)
Synonyms: Panicum flavidum, Setaria flavida

Yellow Watercrown Grass is a perennial grass, characterized by by spikes separated by 2-4 times their length, and spikelets (especially in fruit) spherical. Stems are tufted, slightly compressed, 1-3 ft tall from a prostrate base. Leaf sheaths are strongly keeled, smooth. Leaves are linear-lanceshaped, flat or folded, 5-30 cm long, 0.5-1 cm broad. Ligule is about 0.5 mm. Inflorescence axis is 5-20 cm. Flower racemes are 6-9, 1.5-2.5 cm long, widely spaced. Rachis is about 0.5 mm wide, slightly winged, prolonged into a point. Spikelets are plumply ovate, gibbous, 1.5-2.5 mm, milk-white or purplish. Lower glume is broadly ovate, about 1/2 as long as spikelet; upper glume 2/3-3/4 as long as spikelet, 7-veined; lower lemma as long as spikelet, 5-veined; upper lemma bony, granulate. Flowering: July-October.

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The flower labeled Yellow Watercrown Grass is ...