| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
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| Poaceae | Cenchrus americanus | Pearl Millet | Fallow fields, other disturbed areas. | Native of the Old World (Africa and tropical Asia). | 
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| Poaceae | Cenchrus biflorus | Indian Sandbur | Disturbed areas, ballast, presumably only a waif. | Native of Africa and s. Asia. Reported from ballast in Mobile, AL. | 
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| Poaceae | Cenchrus brownii | Slim-bristled Sandspur | Disturbed areas, maritime grasslands. | S. FL (where apparently native), elsewhere in the se. United States (NC, GA, AL, where presumably introduced); West Indies; Central America, n. South America. The sole known NC specimen was collected in 1885 by Gerald McCarthy in NC "in locis navalibus et vastis". | 
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| Poaceae | Cenchrus ciliaris | Buffelgrass | Disturbed areas. | Native of Africa. | 
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| Poaceae | Cenchrus echinatus | Southern Sandspur, Bristly Sandspur, Hedgehog Grass, Cadillo | Fields, roadsides, disturbed areas. | NC (and DC?) south to FL, west to CA, south into the tropical America. The basis for the record for w. VA in FNA is not clear. | 
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| Poaceae | Cenchrus flaccidus | Himalayan Fountaingrass | Disturbed areas. | Native of c. Asia. | 
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| Poaceae | Cenchrus gracillimus | Sandhill Sandspur | Longleaf pinelands, other sandy habitats. | N. FL, s. and e. GA, s. AL; West Indies (Cuba, Jamaica). | 
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| Poaceae | Cenchrus latifolius | Uruguayan Fountaingrass | Spreading from horticultural use. | Native of South America. | 
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| Poaceae | Cenchrus longisetus | Feathertop | Cultivated as an ornamental, and sometimes escaped. | Native of W. Asia and ne. Africa. Reported as an introduction in GA (Kartesz 1999), apparently erroneously. | 
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| Poaceae | Cenchrus longispinus | Northern Sandspur, Common Sandspur | Fields, roadsides, disturbed areas, lawns. | ME west to OR, south to FL, TX, and CA. | 
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| Poaceae | Cenchrus myosuroides | Big Sandspur | Shell middens, maritime hammocks, coastal berms, roadsides, disturbed areas. | SC south to FL, west to TX; West Indies; Mexico to South America. | 
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| Poaceae | Cenchrus nervosus | | Disturbed areas. | Native of South America. | 
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| Poaceae | Cenchrus orientalis | Laurisa Grass, White Fountain Grass | Disturbed areas. | Native of s. Asia west to w. Asia and n. Africa. | 
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| Poaceae | Cenchrus pedicellatus | Kyasuma Grass, Hairy Fountain Grass | Citrus groves, other disturbed areas. | Native of tropical Africa and s. Asia. | 
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| Poaceae | Cenchrus polystachios ssp. setosus | Mission Grass | Pine flatwoods, moist disturbed pastures, and roadsides. | Native of tropical Africa. | 
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| Poaceae | Cenchrus purpurascens | Chinese Fountaingrass, Foxtail Fountaingrass | Disturbed areas, roadsides, floodplains, old fields. | Native of e. Asia. This species seems to be developing into an invasive species, with increasing reports of its spread into natural areas, as opposed to merely occurring as a waif following cultivation. Reported for DE and MD, where frequently encountered on roadsides (Longbottom, Naczi, & Knapp 2016). | 
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| Poaceae | Cenchrus purpureus | Elephant Grass, Napier Grass | Swamps, wet grasslands, disturbed areas. | Native of Africa. Naturalized in FL north to the FL-GA border, and in AL (Diamond & Woods 2009). | 
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| Poaceae | Cenchrus setaceus | Tender Fountaingrass | Disturbed areas. | Native of e. Mediterranean Europe. Reported as an introduction in FL, TN, and KY (Wipff in FNA 2003a). Well established in Florida, spreading widely from landscape plantings initially, but then moving at distance. | 
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| Poaceae | Cenchrus setiger | | Disturbed areas. | Native of Africa. Known in our area from ne. FL, ec. MS, and se. and s. TX. | 
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| Poaceae | Cenchrus spinifex | Coastal Sandspur, Grassbur | Fields, roadsides, disturbed areas. | VA south to FL, west to AR and KS; West Indies; Mexico to South America. | 
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| Poaceae | Cenchrus tribuloides | Dune Sandspur | Dunes, sandy fields, sandy woodlands in the outer Coastal Plain. | NY (Long Island) south to FL, west to TX, south into tropical America. | 
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