| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
|---|---|---|---|---|---|
| Eriocaulaceae | Eriocaulaceae | Pipewort Family |  (c) Sorrie, Bruce A. - CC-BY | ||
| Eriocaulaceae | Eriocaulon | Pipewort | (c) Sorrie, Bruce A. - CC-BY | ||
| Eriocaulaceae | Eriocaulon aquaticum | Seven-angled Pipewort, Northern Pipewort | Ponds, natural lake shoreline marshes, floating peat mats, blackwater stream shores. | New Brunswick and Newfoundland and Labrador (Newfoundland) west to Ontario, Manitoba, and Minnesota, south to e. North Carolina, Virginia, and Indiana; also western portions of Ireland and Scotland. |  (c) Fleming, Gary P. |
| Eriocaulaceae | Eriocaulon cinereum | Ashy Pipewort | Drawdown shores of manmade lake, other disturbed wetlands. | Native of Australasia. |  (c) Hsu, Cheng Te - CC-BY-SA |
| Eriocaulaceae | Eriocaulon compressum | Soft-headed Pipewort | Ponds, lakes, other depressions, wetter places in pine flatwoods and pine savannas, acidic seeps, Atlantic white cedar (Chamaecyparis thyoides) swamps. | New Jersey south to s. Florida, west to e. Texas. |  (c) Ward, Scott G |
| Eriocaulaceae | Eriocaulon decangulare var. decangulare | Common Ten-angled Pipewort | Wet pine savannas and pine flatwoods, bogs, mafic fens and seeps, seasonally flooded ponds, seepage bogs and swamps, wind-tidal marshes, sea-level fens. | New Jersey south to s. Florida, west to sw. Arkansas and e. Texas; Mexico (Campeche, Michoacán, Tabasco, Veracruz) and Central America. |  (c) Hill, Sonnia |
| Eriocaulaceae | Eriocaulon decangulare var. latifolium | Panhandle Pipewort | Seepage bogs. | Restricted to Panhandle Florida, s. Alabama, and s. Mississippi; disjunct in ne. Florida. |  (c) Weakley, Alan |
| Eriocaulaceae | Eriocaulon koernickeanum | Dwarf Pipewort | This layers of sand and gravel or muck in seepage areas on sandstone, nepheline syenite, and prairie seeps (Interior Highlands and WGCP) or granite flatrocks (in GA), other seepages, bogs. | W. Arkansas and e. Oklahoma south to e. and c. Texas; disjunct in c. Georgia. |  (c) Hill, Sonnia |
| Eriocaulaceae | Eriocaulon lineare | Depression pond and lakeshore margins, limesink ponds, wet flatwoods, seepage bogs. | Sw. Georgia south to c. peninsular Florida, west to s. Mississippi. Eriocaulon lineare was reported for North Carolina (Kral in FNA 2000), but this is apparently in error. |  © Floyd A. Griffith | |
| Eriocaulaceae | Eriocaulon nigrobracteatum | Dark-headed Hatpins | Seepage bogs. | Endemic to the Florida Panhandle (Bay, Calhoun, and Gulf counties) |  © Floyd A. Griffith |
| Eriocaulaceae | Eriocaulon parkeri | Estuary Pipewort | Gravelly and sandy intertidal zones along fresh to oligohaline marshes, tidal swamp forests, less typically in natural lakes. | Maine and Québec south to ne. North Carolina. |  (c) Fleming, Gary P. |
| Eriocaulaceae | Eriocaulon ravenelii | Ravenel's Pipewort | Calcareous wet pine flatwoods and prairies. | Ne. Florida and e. Panhandle Florida south to s. Florida; disjunct (historically) in e. South Carolina. |  (c) Horn, Jay |
| Eriocaulaceae | Eriocaulon texense | Texas Hatpins | Sandhill seepage bogs, Altamaha Grit outcrops, seepage over the Catahoula in the West Gulf Coastal Plain, seepage over granite in the Blue Ridge Escarpment, Blue Ridge fens over amphibolite. | Sc. North Carolina south to w. Panhandle Florida, west to e. Texas; disjunct in w. South Carolina in the uppermost Piedmont in the Blue Ridge Escarpment region. Discovered in Watauga County, North Carolina (P. McMillan, pers.comm. 2025). |  (c) Ward, Scott G |
| Eriocaulaceae | Lachnocaulon | Bogbuttons |  (c) Hill, Sonnia | ||
| Eriocaulaceae | Lachnocaulon anceps | Common Bogbuttons | Moist to dry sands, moist peats, in pinelands, sometimes locally abundant in open disturbed areas where competition has been removed. | S. New Jersey south to s. Florida, west to se. Texas; rarely disjunct inland off the Coastal Plain, as in ec. Tennessee; West Indies (Cuba). | (c) Hill, Sonnia |
| Eriocaulaceae | Lachnocaulon beyrichianum | Southern Bogbutton | Scrubby flatwoods, flatwoods, upper margins of Coastal Plain doline ponds (sometimes under scrub oaks). | Se. North Carolina south to Panhandle Florida and s. peninsular Florida. |  (c) Horn, Jay |
| Eriocaulaceae | Lachnocaulon digynum | Pineland Bogbutton | Hillside seepage bogs, wet pine savannas. | Panhandle Florida (east to Liberty and Franklin counties) and s. Alabama west to s. Mississippi; disjunct west of the Mississippi River in w. Louisiana and extreme e. Texas. |  © Floyd A. Griffith |
| Eriocaulaceae | Lachnocaulon engleri | Engler’s Bogbutton | Pondshores, pine savannas. | N. Florida peninsula south to s. Florida; Panhandle Florida and s. Alabama. |  (c) Campos, Aidan |
| Eriocaulaceae | Lachnocaulon minus | Brown Bogbutton | Upper margins of Coastal Plain doline ponds, other pineland situations, ditches through wet pine savannas, wet 'scrapes'. | E. North Carolina south to s. peninsular Florida, west to Panhandle Florida and se. Alabama. |  (c) Ward, Scott G |
| Eriocaulaceae | Syngonanthus | Yellow Hatpins |  (c) Horn, Jay | ||
| Eriocaulaceae | Syngonanthus flavidulus | Yellow Hatpins, Bantam-buttons | Pine savannas, pine flatwoods, borders of pineland ponds, and adjacent ditches. Often growing as the dominant plant in wet sandy firelanes adjacent to mesic or scrubby flatwoods in peninsular FL. | Se. North Carolina south to s. Florida, west to s. Mississippi. |  (c) Keim, Mary - CC-BY-NC-SA, permission granted to NCBG |