Barnyard grass
Echinochloa muricata Beauv.
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Annual
1-3 ft.
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Overlapping
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5-15 mm wide Flat with rough edges
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Broad
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None
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None
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Round & Branching at Nodes
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Panicle of Spike-like branches
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Found in late summer/early fall. Seed structures purplish and covered with short stiff bristles.
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Bermudagrass
Cynodon dactylon L.
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Perennial/ Annual
1-2 ft
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Papery
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8-15 mm wide Hairy on top & bottom
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Narrow
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None
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Fringe of Hairs
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Prostrate & upright
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3-7 Spiked branches originating from a single whorl
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Spreads by both Stolons &.Rhizomes. Found as a Perennial only in very southern PA and further south.
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Big Bluestem
Andropogon gerardii Vitman
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Perennial
7-9 ft
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Split, hairy
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10-14 mm wide Smooth with fringe of hairs at junction of blade and Sheath
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Narrow
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None
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Short membrane
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Round & upright
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Raceme, Red in color
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Stems purplish at base. Awns in seed clusters makes Inflorescence look hairy.
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Crabgrass (Large)
Digitaria sanguinalis L.
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Annual
2-3 ft
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Overlapping
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5-12 mm wide Rough edges with hairs on both sides Red-purple color
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Broad & divided
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None
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Membrane Rounded at top
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Upright to Prostrate
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3-10 Spiked branches in whorls at top of stem
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Found in late summer/early fall.
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Crabgrass (Smooth)
Digitaria ischaemum L.
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Annual
1-2 ft
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Overlapping
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5-12 mm wide with no hairs on either side. More purplish than Large Crabgrass
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Broad & divided
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None
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Membrane Rounded at top
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Upright or Prostrate
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3-10 Spiked branches in whorls at top of stem
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Found in lawns or heavily grazed pastures in late summer/early fall.
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Fall panicum
Panicum dichotomiflorum Michx.
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Annual
1-4 ft
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Overlapping
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10-20 mm wide Smooth or sparsely hairy near base
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Broad
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None
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Fringe of hairs
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Upright to Prostrate
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Fine, wide-spreading Panicle
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Found in late summer/early fall.
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Giant foxtail
Setaria faberi.
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Annual
3-6 ft
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Overlapping Edges are hairy
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10-20 mm wide Hairy on top & smooth on bottom
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Broad & hairy on edges
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None
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Fringe of hairs
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Round & upright
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Spike-like Panicle, bristly, drooping
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Inflorescence bushy like a fox's tail. Hairy blade is key to identification.
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Green foxtail
Setaria viridis L.
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Annual
1-3 ft
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Overlapping
Edges are hairy
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5-12 mm wide Not hairy on top or bottom
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Broad & sometimes hairy
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None
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Fringe of hairs
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Round & upright
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Spike-like Panicle, bristly
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Inflorescence bushy like a fox's tail and slightly purple in color. No hairs on leaves.
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Italian ryegrass
Lolium italicum Parn.
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Annual-to- Perennial
1-2 ft
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Overlapping
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2-6 mm wide
Flat & pointed at tip. Waxy
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May be divided
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Overlapping
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Membrane, Rounded at top
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Round-to-flat
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Slender stiff Spike with Awns
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Short growing Bunchgrass with waxy leaves that are shiny. Spikelet edge against stem.
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Kentucky bluegrass
Poa pratenis L.
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Perennial
1-2 ft
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Split
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2-5 mm wide Boat-shaped tip
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Broad
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None
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Very short membrane
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Round-to-flat
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Fine-Panicle
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Sod -grass (short Rhizomes) Dark green. Invades overgrazed pastures
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Nimblewill
Muhlenbergia schreberi Gmel.
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Perennial
1-2 ft
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Split & overlapping
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2-4 mm wide Rough on top with hairs behind ligule
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Narrow
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None
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Short Membrane
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Mostly Prostrate
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Many fine, slender Panicles
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Sod-forming (Stolons). Flowers in late summer to early fall.
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Orchardgrass
Dactylis glomerata L.
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Perennial
1-3 ft
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Split
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5-12 mm wide V-shaped at base Flat & pointed at tip
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Broad & Divided
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None
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White membrane Pointed at top
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Flat
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Course-Panicle
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Bunchgrass
Light green in color
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Perennial ryegrass
Lolium perenne L.
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Perennial
1-2 ft.
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Overlapping
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2-6 mm wide
Folded in shoot
V-shaped, Waxy
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Narrow
May be divided
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Short
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Membrane Toothed at top
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Round-to-flat
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Slender stiff Spike
No Awns
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Short growing Bunchgrass with waxy leaves that are shiny. Spikelet placed with edge against stem.
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Quackgrass
Elytrigia repens.
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Perennial
1-3 ft
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Overlapping with hairs
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5-10 mm wide
Slightly hairy on upper surface
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Broad & divided
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Long-clasping
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Short membrane
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Round
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Slender stiff Spike
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Sod forming with prominent fast spreading

Rhizomes.
Spikelet flat against stem
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Red top
Agrostis gigantea Roth
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Perennial
1-3 ft
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Overlapping
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2-7 mm wide
Flat
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Broad & V-shaped
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None
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Tall membrane
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Round
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Panicle Rust colored at maturity
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Sod-grass (short Rhizomes). Prominent ridges on upper surface of blade.
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Reed canarygrass
Phalaris arundinacea L.
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Perennial
1-6 ft
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Overlapping
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10-20 mm wide
Flat with rough edges
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Narrow & continuous
Yellow
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None
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Prominent membrane
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Round
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Panicle
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Sod forming (prominent Rhizomes).
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Smooth bromegrass
Bromus inermis L.
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Perennial
1-3 ft
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Closed
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4-12 mm wide
Flat & pointed at tip
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Narrow & divided
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None
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Short membrane
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Round
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Large Panicle, often drooping
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Young plants may have pubescence on Sheath. Rhizomes covered with brown papery scales.
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Switchgrass
Panicum virgatum L.
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Perennial
3-8 ft
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Split, with hairy margin
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7-14 mm wide
Hairy on top
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Broad, often with hairs
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None
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Fringe of short Hairs
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Round & upright
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Large Panicle
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Leaves covered with hairs.
Spreads by Rhizomes
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Tall Fescue
Festuca arundinacea Schreb.
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Perennial
1-3 ft
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Overlapping
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5-10 mm wide
Dark green
Very rough edges
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Broad & divided.
Wrinkled on edges
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Blunt with few hairs
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Short membrane
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Round
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Spreading Panicle
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Bunchgrass
Prominently veined, leathery, dark green leaves with rough edges.
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Timothy
Phleum pretense L.
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Perennial
2-3 ft
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Overlapping
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4-12 mm wide
Flat & pointed at tip
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Broad & continuous
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None
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White membrane with two notches
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Round
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Spike-like Panicle
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Bunchgrass with corms (onion-like bulb at base of stem)
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Witchgrass
Panicum capillare L.
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Annual
1-3 ft
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Overlapping, hairy
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8-15 mm wide
Hairy on top & bottom
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Narrow
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None
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Fringe of hairs
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Round & upright
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Large Panicle
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Leaves covered with hairs.
Large Panicle often breaking off of stem.
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Yellow foxtail
Setaria glauca.
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Annual
1-3 ft
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Overlapping
Not hairy
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5-10 mm wide Hairy only on top near base of blade
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Broad & hairy on edges
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None
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Fringe of hairs
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Round & upright
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Spike-like Panicle, bristly
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Inflorescence is bushy like a fox's tail. Hairs only on upper surface of blade near base.
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