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Annual; culms profusely branched at the base, at first prostrate, finally ascending, 1–30 cm. high.. Leaf-blades broadly linear, 0.5–12 cm. long, 1–5 mm. wide, glaucous, tapering to an acuminate tip.. Inflorescence ellipsoid or ovoid, 0.5–3 cm. long, embraced at the base by 2 inflated distichous sheaths.. Spikelets lanceolate, 2.5–4 mm. long, laterally flattened, disarticulating below the floret; glumes narrowly lanceolate, ±2.5 mm. long, 1-nerved, stiffly ciliate on the keel; lemma lanceolate, as long as the spikelet; palea 2-nerved; anthers 3, 0.5–1 mm. long.. Grain obovate-elliptic, 1.5 mm. long.. Fig. 99.
Superficially resembling an awnless Alopecurus; culms tufted, erect to prostrate, 1–4 dm; spike-like panicles several, terminal and lateral, ovoid-cylindric, 1–4 cm × 6–10 mm, pale green, the base of each partly included in the distended sheaths of the 1 or 2 subtending lvs; spikelets 3 mm; 2n=36. Native of s. Europe, intr. in waste places here and there from Mass. to Del. and Pa., w. to Wis., Io., and Mo.
Spikelets 2.7–3.2 mm long, lanceolate, tardily deciduous; glumes unequal, the inferior shorter than the superior, both slightly shorter than the lemma, glabrous on the margins; lemma as long as the spikelet, lanceolate; palea 2-nerved; anthers 0.7–1.1 mm long.
Annual; culms profusely branched at the base, at first prostrate, finally ascending, up to 75 cm long; leaf sheath margins and collar glabrous; leaf lamina 2–10 cm × 1–5 mm, glaucous, tapering to an acuminate apex.
Inflorescence 0.3–7.5 cm long, ovoid to cylindrical, half or less embraced by the uppermost leaf sheaths.
Annual with prostrate stems radiating from the root.
Caryopsis 1–1.5 mm long.
