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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).
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).
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).
Timothy,
Phleum pratense ssp. pratense
Panicle dense spikelike, cylindrical. Spikelets strongly flattened, 1-flowered, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
Sandhills Dropseed,
Sporobolus junceus
Panicle oblong or narrowly pyramidal, open, per Manual of the Grasses of the United States (Hitchcock & Chase, 1950).
Sandhills Dropseed,
Sporobolus junceus
Panicle branches whorled, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
Carolina Dropseed,
Sporobolus pinetorum
Panicle branches alternate (occasionally opposite but never regularly whorled), per Weakley's Flora.
Prairie Dropseed,
Sporobolus heterolepis
Panicle open, branches ascending and primarily alternate, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
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).
Smut-grass,
Sporobolus indicus
Panicle usually spikelike but more or less interrupted, per Manual of the Grasses of the United States (Hitchcock & Chase, 1950).
West Indian Dropseed,
Sporobolus jacquemontii
Panicles 14-35cm long, 0.4-3cm wide, contracted, interrupted, and rather lax, per Grass Manual on the Web.
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).
Savannah Hairgrass,
Muhlenbergia expansa
Panicle capillary, flexuous, fragile, and tends to break up over the winter, per Weakley's Flora (2015).
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).
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).
Nimblewill,
Muhlenbergia schreberi
Panicle slender, dense, per Weakley's Flora (2015).
Creeping Bentgrass,
Agrostis stolonifera
Panicle open only at anthesis, otherwise contracted, often dense, per Flora of China.
Creeping Bentgrass,
Agrostis stolonifera
Panicle narrow, linear to lanceolate, 5-20cm, open only at anthesis, per Flora of China.
Black Bentgrass,
Agrostis gigantea
Panicle pyramidal-oblong, reddish, to 20cm long, per Manual of the Grasses of the United States (Hitchcock & Chase, 1950).
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).
Nuttall's Reedgrass,
Greeneochloa coarctata
Panicle dense, to 20cm long, purplish, per The Grasses of North Carolina (Blomquist, 1948).
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).
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).
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).
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).
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).
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).
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).
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).
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).
White Cutgrass,
Leersia virginica
Panicle branches rather distant, stiffly spreading, naked below, per Manual of the Grasses of the United States (Hitchcock & Chase, 1950).
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).
Southern Wild-rice,
Zizaniopsis miliacea
Panicle rather narrow, nodding, 30-50cm long, per Manual of the Grasses of the United States (Hitchcock & Chase, 1950).
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).
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).
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).
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).
Perennial Foxtail-grass,
Setaria parviflora
Panicle 3-8(10)cm long; plant from knotty rhizomes, per Weakley's Flora (2015).
Yellow Foxtail,
Setaria pumila
Panicle dense, evenly cylindric, spikelike, yellow at maturity, per Manual of the Grasses of the United States (Hitchcock & Chase, 1950).
Nodding Foxtail Grass,
Setaria faberi
Panicle conspicuously nodding; spikelets about 3mm long, per Manual of the Grasses of the United States (Hitchcock & Chase, 1950).
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).
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).
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).
Swamp Barnyard-grass,
Echinochloa walteri
Panicle branches spikelike, spikelets congested on short secondary branches, per Wildflowers of the Eastern United States (Duncan & Duncan, 1999).
Water Paspalum,
Paspalum fluitans
Panicle branches extend beyond outermost spikelets & disarticulate at maturity, per Weakley's Flora.
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).
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).
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).
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).
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).
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).
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).
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).
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).
Fall Panicum,
Panicum dichotomiflorum var. dichotomiflorum
Panicle's main branches ascending, per Manual of the Grasses of the United States (Hitchcock & Chase, 1950).
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).
Wiry Panicgrass,
Panicum flexile
Mature panicle slender, branches ascending-spreading; spikelets long-acuminate, per Weakley's Flora.
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).
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).
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).