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Cogongrass,
Imperata cylindrica
Spikelike, tightly branched panicle. Spikelets obscured by silky hairs, per Nonnative Invasive Plants of Southern Forests (Miller, 2003).
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Cogongrass,
Imperata cylindrica
Silky spikelike panicles are terminal, cylindrical, 1-8" long, 0.2-1" wide, per Nonnative Invasive Plants of Southern Forests (Miller, 2003).
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Timothy,
Phleum pratense ssp. pratense
Panicle cylindric, commonly 5-10cm long, often longer, per Manual of the Grasses of the United States (Hitchcock & Chase, 1950).
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Timothy,
Phleum pratense ssp. pratense
Panicle dense spikelike, cylindrical. Spikelets strongly flattened, 1-flowered, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Sandhills Dropseed,
Sporobolus junceus
Panicle oblong or narrowly pyramidal, open, per Manual of the Grasses of the United States (Hitchcock & Chase, 1950).
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Sandhills Dropseed,
Sporobolus junceus
Panicle branches whorled, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Carolina Dropseed,
Sporobolus pinetorum
Panicle branches alternate (occasionally opposite but never regularly whorled), per Weakley's Flora.
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Prairie Dropseed,
Sporobolus heterolepis
Panicle open, branches ascending and primarily alternate, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Smut-grass,
Sporobolus indicus
Healthy panicles are greenish when mature, turning light tan upon drying, per Wildflowers of the Eastern United States (Duncan & Duncan, 1999).
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Smut-grass,
Sporobolus indicus
Panicle usually spikelike but more or less interrupted, per Manual of the Grasses of the United States (Hitchcock & Chase, 1950).
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West Indian Dropseed,
Sporobolus jacquemontii
Panicles 14-35cm long, 0.4-3cm wide, contracted, interrupted, and rather lax, per Grass Manual on the Web.
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Rough Dropseed,
Sporobolus clandestinus
Panicle narrow, contracted, 5-10cm long, usually partly enclosed, per Manual of the Grasses of the United States (Hitchcock & Chase, 1950).
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Savannah Hairgrass,
Muhlenbergia expansa
Panicle capillary, flexuous, fragile, and tends to break up over the winter, per Weakley's Flora (2015).
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Pink Muhlygrass,
Muhlenbergia capillaris
Panicle purple, oblong, diffuse, 1/3-1/2 the height of the culm, per Manual of the Grasses of the United States (Hitchcock & Chase, 1950).
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Dune Hairgrass,
Muhlenbergia sericea
Inflorescence a loose, limber panicle that turns pinkish when mature, per Guide to the Wildflowers of SC, 1st ed. (Porcher & Rayner, 2001).
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Nimblewill,
Muhlenbergia schreberi
Panicle slender, dense, per Weakley's Flora (2015).
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Creeping Bentgrass,
Agrostis stolonifera
Panicle open only at anthesis, otherwise contracted, often dense, per Flora of China.
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Creeping Bentgrass,
Agrostis stolonifera
Panicle narrow, linear to lanceolate, 5-20cm, open only at anthesis, per Flora of China.
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Black Bentgrass,
Agrostis gigantea
Panicle pyramidal-oblong, reddish, to 20cm long, per Manual of the Grasses of the United States (Hitchcock & Chase, 1950).
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Autumn Bentgrass,
Agrostis perennans
Spikelets scattered, but absent from the basal portion of panicle branches, per Wildflowers of the Eastern United States (Duncan & Duncan, 1999).
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Nuttall's Reedgrass,
Greeneochloa coarctata
Panicle dense, to 20cm long, purplish, per The Grasses of North Carolina (Blomquist, 1948).
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Nuttall's Reedgrass,
Greeneochloa coarctata
Panicle erect, dense, more or less lobed, 8-20cm long, purple-tinged, per Manual of the Grasses of the United States (Hitchcock & Chase, 1950).
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Common Woodreed,
Cinna arundinacea
Panicle greenish, 12-30cm long, 3-12cm broad, branches ascending or spreading, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Bearded Shorthusk,
Brachyelytrum erectum
Panicle open, narrow; branches strongly ascending, slightly rough to the touch, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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Red Sprangletop,
Dinebra panicea ssp. brachiata
Panicle of numerous approximate slender racemes, ~ half the length of culm, per Manual of the Grasses of the United States (Hitchcock & Chase, 1950).
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Red Spangletop,
Dinebra panicea ssp. mucronata
Panicle of numerous approximate slender racemes, ~ half the length of culm, per Manual of the Grasses of the United States (Hitchcock & Chase, 1950).
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Green Sprangletop,
Disakisperma dubium
Panicle of spreading or ascending racemes, approximate or somewhat distant, per Manual of the Grasses of the United States (Hitchcock & Chase, 1950).
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Sweet Vernal Grass,
Anthoxanthum odoratum
Panicles yellowish-brown, cylindrical, dense, usually less than 6cm long, per How to Know the Grasses: Pictured Key Nature Series (Pohl, 1954).
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Catchfly Cutgrass,
Leersia lenticularis
Panicle open, drooping, the branches ascending or spreading, naked below, per Manual of the Grasses of the United States (Hitchcock & Chase, 1950).
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Catchfly Cutgrass,
Leersia lenticularis
Blades lax, 1-2cm wide. Panicle open; spikelets closely imbricate, per Manual of the Grasses of the United States (Hitchcock & Chase, 1950).
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White Cutgrass,
Leersia virginica
Panicle branches rather distant, stiffly spreading, naked below, per Manual of the Grasses of the United States (Hitchcock & Chase, 1950).
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Rice Cutgrass,
Leersia oryzoides
Axillary panicles partly included in the sheaths, spikelets cleistogamous, per Manual of the Grasses of the United States (Hitchcock & Chase, 1950).
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Southern Wild-rice,
Zizaniopsis miliacea
Panicle rather narrow, nodding, 30-50cm long, per Manual of the Grasses of the United States (Hitchcock & Chase, 1950).
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Southern Wild-rice,
Zizaniopsis miliacea
Panicle's numerous branches fascicled, to 15-20cm long, naked at base, per Manual of the Grasses of the United States (Hitchcock & Chase, 1950).
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Saltmarsh Foxtail-grass,
Setaria magna
Culms to 4m tall. Panicles densely flowered, nodding, to 50cm long, per Manual of the Grasses of the United States (Hitchcock & Chase, 1950).
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Yellow Foxtail,
Setaria italica
In larger forms the panicles may be 30cm long x 3cm thick, yellow or purple, per Manual of the Grasses of the United States (Hitchcock & Chase, 1950).
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Perennial Foxtail-grass,
Setaria parviflora
Flowers in a spike-like panicle 0.5-3cm wide, yellow or purplish, per Forest Plants of the Southeast and Their Wildlife Uses (Miller & Miller, 2005).
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Perennial Foxtail-grass,
Setaria parviflora
Panicle 3-8(10)cm long; plant from knotty rhizomes, per Weakley's Flora (2015).
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Yellow Foxtail,
Setaria pumila
Panicle dense, evenly cylindric, spikelike, yellow at maturity, per Manual of the Grasses of the United States (Hitchcock & Chase, 1950).
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Nodding Foxtail Grass,
Setaria faberi
Panicle conspicuously nodding; spikelets about 3mm long, per Manual of the Grasses of the United States (Hitchcock & Chase, 1950).
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Green Foxtail,
Setaria viridis var. viridis
Panicle erect or ~ nodding, cylindric but tapering a little at the summit, per Manual of the Grasses of the United States (Hitchcock & Chase, 1950).
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Chinese Fountaingrass,
Cenchrus purpurascens
Softly bristly panicles 8-15cm long; bristles of the fascicles to 2cm long, per Manual of the Grasses of the United States (Hitchcock & Chase, 1950).
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Jungle-rice,
Echinochloa colonum
Panicle 5-15cm long; racemes 1-2cm long, appressed or ascending, per Manual of the Grasses of the United States (Hitchcock & Chase, 1950).
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Swamp Barnyard-grass,
Echinochloa walteri
Panicle branches spikelike, spikelets congested on short secondary branches, per Wildflowers of the Eastern United States (Duncan & Duncan, 1999).
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Water Paspalum,
Paspalum fluitans
Panicle branches extend beyond outermost spikelets & disarticulate at maturity, per Weakley's Flora.
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Guinea Grass,
Megathyrsus maximus
Panicles 20-50cm long, long rather stiff branches ascending, naked at base, per Manual of the Grasses of the United States (Hitchcock & Chase, 1950).
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Browntop Millet,
Urochloa ramosa
Panicles of asending spikelike racemes along an angled axis, per Manual of the Grasses of the United States (Hitchcock & Chase, 1950).
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American Cupscale,
Sacciolepis striata
Inflorescence a slender panicle w branches so short it may appear spikelike, per Wildflowers of the Eastern United States (Duncan & Duncan, 1999).
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Beaked Panicum,
Coleataenia anceps ssp. anceps
Panicles 15-40cm long, the slender remote branches somewhat spreading, per Manual of the Grasses of the United States (Hitchcock & Chase, 1950).
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Redtop Panicgrass,
Coleataenia rigidula ssp. rigidula
Spikelets greeinish-purple, attached on 1 side of the panicle branches, per Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians (Horn, Cathcart, Hemmerly, & Duhl, 2005).
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Redtop Panicgrass,
Coleataenia rigidula ssp. rigidula
Inflorescence a narrow, pyramidal panicle, 4-12" tall, per Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians (Horn, Cathcart, Hemmerly, & Duhl, 2005).
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Seaside Panicum,
Panicum amarum
Spikelets of inflorescence dense, forming a narrow panicle to 14" long and 2" wide, per Guide to the Wildflowers of SC, 2nd ed. (McMillan, Porcher, Rayner, & White; 2022).
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Switchgrass,
Panicum virgatum var. virgatum
Panicle large and open, 15-50 cm long, per How to Know the Grasses: Pictured Key Nature Series (Pohl, 1954).
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Blunt Switchgrass,
Panicum virgatum var. cubense
Panicle narrower than that of var. virgatum, with ascending branches, per Manual of the Grasses of the United States (Hitchcock & Chase, 1950).
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Fall Panicum,
Panicum dichotomiflorum var. dichotomiflorum
Panicle's main branches ascending, per Manual of the Grasses of the United States (Hitchcock & Chase, 1950).
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Fall Panicum,
Panicum dichotomiflorum var. dichotomiflorum
Panicles terminal and axillary, mostly included at base, per Manual of the Grasses of the United States (Hitchcock & Chase, 1950).
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Wiry Panicgrass,
Panicum flexile
Mature panicle slender, branches ascending-spreading; spikelets long-acuminate, per Weakley's Flora.
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Old-witch Panicgrass,
Panicum capillare
Panicles densely flowered, very diffuse, included at base until maturity, per Manual of the Grasses of the United States (Hitchcock & Chase, 1950).
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Torpedo Grass,
Panicum repens
Panicle open, 7-12cm long, its somewhat distant branches stiffly ascending, per Manual of the Grasses of the United States (Hitchcock & Chase, 1950).
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Swamp Phanopyrum,
Phanopyrum gymnocarpon
Panicles of several to many stiffly ascending racemes along a main axis, per Manual of the Grasses of the United States (Hitchcock & Chase, 1950).