Flora of the Southeastern United States

Eriocaulon aquaticum (Hill) Druce. Common name: Seven-angled Pipewort, Northern Pipewort. Phenology: Jul-Oct. Habitat: Ponds, natural lake shoreline marshes, floating peat mats, blackwater stream shores. Distribution: 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.

Origin/Endemic status: Native

Taxonomy Comments: The name E. septangulare is invalid. E. aquaticum is the correct name if the species is interpreted to include both northern European and northeastern North American plants. If North American plants are distinct from European, the correct name is E. pellucidum; the recent consensus has been that eastern North American and Irish/Scottish plants are conspecific, but the biogeography is unusual.

Synonymy ⓘ: = AqW, C, Can, FNA22, K1, K4, Mi, NE, NS, NY, Pa, POWO, Va; = Eriocaulon septangulare With. — F, G, GW1, S13, Tat, Tx, W, Kral (1966c), invalid name; = n/a — S; > Eriocaulon pellucidum Michx. — RAB. Basionym: Cespa aquatica J. Hill 1769

Links to other floras: = Eriocaulon aquaticum - FNA22

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Wetland Indicator Status:

• Atlantic and Gulf Coastal Plain: OBL
• Eastern Mountains and Piedmont: OBL
• Great Plains: OBL
• Midwest: OBL
• Northcentral & Northeast: OBL

Heliophily ⓘ: 9