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Family	Scientific Name	Common Name	Habitat	Distribution
Poaceae	Sporobolus advenus		Waste area near wool combing mill, presumably merely a waif.	Native of Australia.
Poaceae	Sporobolus airoides	Alkali Sacaton, Coastal Sacaton	Sandy or gravelly areas, saline or alkaline flats; eastwards as a waif in waste areas near wool-combing and other mills.	ND, MT, and BC south to TX, NM, AZ, CA, and Mexico.
Poaceae	Sporobolus buckleyi	Buckley's Dropseed	Brushlands on calcareous loams.	S. TX south to Belize.
Poaceae	Sporobolus clandestinus	Rough Dropseed	Glades, barrens, and thin soil of woodlands, also in dry sands and pine rocklands.	MA, NY, MI, WI, IA, and KS south to s. FL and TX.
Poaceae	Sporobolus compositus var. compositus	Tall Dropseed	Diabase glades and barrens, limestone glades and barrens, disturbed areas over diabase or calcareous rocks.	The general range is centered in the Plains, but extending east into ne. United States. This species and variety are reported for NC in a revision of the S. asper group (Riggins 1977); little is known about the occurrence of this species in NC.
Poaceae	Sporobolus compositus var. drummondii	Drummond’s Dropseed	Glades, barrens, roadsides, disturbed areas, over calcareous substrates.	East to the Ridge and Valley province of e. TN (Chester et al. 1993), occurring over limestone, and in sw. SC (on mafic rocks at Wadakoe Mountain), and allegedly also in GA (Kartesz 2015). It could very likely occur in sw. VA, as it is in Hawkins County, TN, immediately adjacent to VA (Chester et al. 1993).
Poaceae	Sporobolus compositus var. macer		Wet and dry pinelands, prairies, dry woodland margins.	MO and KS south to LA and e. TX.
Poaceae	Sporobolus contractus	Narrow-spiked Dropseed	Disturbed areas.	Native of sw. United States and Mexico (BCN, BCS, CHH, COA, DGO, JAL, NLE, SLP, SON, ZAC).
Poaceae	Sporobolus cryptandrus	Sand Dropseed	Floodplains, shores, disturbed areas.	Native of c. and w. North America, west of the Appalachians. This species is reported for NC by HC, F, and S.
Poaceae	Sporobolus curtissii	Curtiss’s Dropseed	Moist, gummy-clay pine flatwoods.	E. SC south to c. FL. Attributions of S. curtissii to NC and SC prior to 1993 were apparently based on misapplication or confusion with S. teretifolius and/or Sporobolus pinetorum.
Poaceae	Sporobolus domingensis	Coral Dropseed	Coastal sands and limey areas.	Se. GA south to s. FL; disjunct in s. TX; West Indies; Mexico (Yucatan peninsula: CAM, ROO, YUC). The e. GA record (Glynn County) is at Univ. of Georgia (Sorrie, pers. comm.).
Poaceae	Sporobolus fertilis	Giant Parramatta Grass	Disturbed areas, roadsides.	Native of e. Asia.
Poaceae	Sporobolus fimbriatus		Waste areas near wool-combing mills, probably only a waif.	Native of Africa.
Poaceae	Sporobolus flexuosus	Mesa Dropseed	Dry sandy areas (TX), eastwards a waif in waste areas near wool-combing mills.	OK, CO, UT, NV, and CA southwards to TX, NM, AZ, and Mexico.
Poaceae	Sporobolus floridanus	Florida Dropseed	Wet pine savannas.	Se. SC south to ne. FL, west to Panhandle FL. First positively documented for SC in 1995. Earlier attributions of S. floridanus to NC and SC (as by Radford, Ahles, & Bell 1968) were based on misapplication of the name to material actually representing Sporobolus pinetorum.
Poaceae	Sporobolus giganteus	Giant Dropseed	Dry sand-dunes.	KS, CO, and UT south through TX, NM, and AZ to n. Mexico (CHH, COA).
Poaceae	Sporobolus heterolepis	Prairie Dropseed	Barrens, glades, and prairies over mafic, ultramafic, and calcareous rocks (olivine, serpentine, limestone).	The primary distribution of S. heterolepis is in the Plains, with outliers east to nw. GA (Jones & Coile 1988), c. TN (Estes & Beck 2005), w. NC, w. VA, se. PA, ne. United States, and adjacent Canada.
Poaceae	Sporobolus indicus	Smut Grass, Blackseed	Low prairies and swales, roadsides, lawns, disturbed situations.	Pantropical and subtropical, its original distribution apparently in the New World tropics, but obscured by its weedy capabilities and sometimes considered introduced in whole or in part in our area.
Poaceae	Sporobolus jacquemontii	West Indian Dropseed	Pine flatwoods, beaches, roadsides on barrier islands.	SC south to FL Panhandle (Wakulla County), FL peninsula; West Indies.
Poaceae	Sporobolus junceus	Sandhill Dropseed, Pineywoods Dropseed	Longleaf pine sandhills, glades and barrens over mafic rocks, river-scour bars, sandy prairies, pine rocklands, and other dry, open areas.	Se. VA south to s. FL and west to se. OK (Mink, Singhurst, & Holmes 2012) and se. TX; scattered inland in disjunct sites.
Poaceae	Sporobolus neglectus	Barrens Dropseed	Dry rocky barrens and outcrops, over calcareous rocks (such as limestone or dolomite).	ME west to ND, south to NJ, w. VA, TN, LA, and TX; apparently disjunct in WA and AZ.
Poaceae	Sporobolus osceolensis	Osceola Dropseed	Mesic to dry-mesic pine savannas in central peninsular FL, northwards (in n. FL) in seasonally wet habitats (ecotonal seeps and occasionally in the outer margins of depression wetlands) within the pine savanna landscape.	N. FL south to sc. FL peninsula.
Poaceae	Sporobolus ozarkanus	Ozark Dropseed	Limestone glades, diabase glades.	KY west to KS, south to e. TN, AR, and TX; disjunct in c. NC.
Poaceae	Sporobolus pinetorum	Carolina Dropseed, Savanna Dropseed	Wet pine savannas, pine savanna-pocosin ecotones, longleaf pine sandhill-pocosin ecotones, and extending upslope into mesic pine flatwoods or loamy or clayey shelves in the fall-line Sandhills.	Endemic to NC, SC, and e. GA.
Poaceae	Sporobolus purpurascens	Purple Dropseed	Prairies and brush in sandy soils.	C. TX and se. AZ south to s. TX, Mexico (CHP, COL, JAL, OAX, PUE, TAS, VER), Central America, and South America.
Poaceae	Sporobolus pyramidalis	Giant Ratstail Grass	Roadsides.	Native of the Old World Tropics.
Poaceae	Sporobolus pyramidatus	Match Grass, Whorled Dropseed	Salt and brackish marshes, coastal rock barrens, disturbed coastal areas.	S. FL; IL, MO, NE, CO, and UT south through LA, TX, NM, and AZ to Mexico, Central America, and South America; West Indies.
Poaceae	Sporobolus silveanus	Silveus's Dropseed	Prairies, longleaf pine savannas.	Sw. AR and se. OK south to w. LA and e. TX.
Poaceae	Sporobolus tenuissimus		Disturbed areas, in nurseries, also waste areas near wool-combing mills, probably only a waif.	Native of the tropical New World; introduced in the Old World tropics.
Poaceae	Sporobolus teretifolius	Wireleaf Dropseed	Wet savannas, pitcherplant bogs.	Se. NC, ne. SC, s. GA, and se. AL (Houston County). Many of the counties reported for this species in RAB actually are based on misidentified specimens of S. pinetorum. In a few very wet savannas of Columbus and Brunswick counties, NC, S. teretifolius is dominant or codominant over many hectares. Like many savanna grasses, S. teretifolius generally flowers only following fire.
Poaceae	Sporobolus texanus	Texas Dropseed	Seasonally moist areas, often somewhat saline.	NE, CO, and UT south to TX, NM, AZ, and Mexico (CHH, SON).
Poaceae	Sporobolus vaginiflorus	Poverty Dropseed	Glades, barrens, open disturbed sites.	The species occurs nearly throughout e. United States.
Poaceae	Sporobolus virginicus	Seashore Dropseed, Coastal Dropseed	Salt marshes, tidal mud flats, and low dunes in the outer Coastal Plain.	Se. NC along the coast to TX and south through Mexico and Central America to n. South America (its alleged occurrence in se. VA is apparently incorrect); West Indies; also native in e. Asia, Africa, Australia and the Pacific region (Simon & Jacobs 1999).
Poaceae	Sporobolus wrightii	Giant Sacaton	Clay soils and subsaline areas, eastwards in waste areas near wool-combing mills, probably only a waif.	Native of sw. United States. OK and TX west to s. CA, south to c. Mexico.

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