Eryngium aquaticum Linnaeus. Common name: Marsh Eryngo. Phenology: Jul-Sep. Habitat: Tidal freshwater to brackish marshes; slightly inland in wet peaty pine savannas over calcareous substrates. Distribution: NY (Staten Island) and NJ to ne. FL along the Atlantic coast; Gulf Coast of FL Panhandle, s. AL, and s. MS.
Origin/Endemic status: Endemic
Synonymy ⓘ: = Eryngium aquaticum L. var. aquaticum – K1, K3, K4, MC, NY, RAB, Va, Bell (1963); = Eryngium virginianum Lam. – S; < Eryngium aquaticum L. – C, F, Fl7, G, GW2, Pa, Tat, WH3
Wetland Indicator Status:
- Atlantic and Gulf Coastal Plain: OBL (taxonomic split from wetland indicator species)
- Eastern Mountains and Piedmont: OBL
- Northcentral & Northeast: OBL (taxonomic split from wetland indicator species)
Heliophily ⓘ: 9
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Horticultural Information
Intro: Coarse, erect, aquatic perennial/biennial of tidal freshwater or brackish marshes.
Stems: Stems thick, longitudinally ridged, branched above, whitish-green.
Leaves: Leaves alternate, petiolate, linear to lance-shaped, 4-8 in. long, sometimes finely toothed (upper leaves smaller and more toothed or spiny-lobed), with notably netted veins.
Inforescence:
Flowers: Flowers in dense, compact, thimble-shaped heads surrounded by a whorl of large, spiny-toothed bracts; pale blue; tiny; consisting of 5 minute petals, 5 stamens and a divided style.
Fruits:
Comments:
Height: 1-4 ft.
plant sale text:
bloom table text:
description: Coarse, erect, aquatic perennial/biennial of tidal freshwater or brackish marshes.
stems: Stems thick, longitudinally ridged, branched above, whitish-green.
leaves: Leaves alternate, petiolate, linear to lance-shaped, 4-8 in. long, sometimes finely toothed (upper leaves smaller and more toothed or spiny-lobed), with notably netted veins.
inflorescence:
flowers: Flowers in dense, compact, thimble-shaped heads surrounded by a whorl of large, spiny-toothed bracts; pale blue; tiny; consisting of 5 minute petals, 5 stamens and a divided style.
fruits:
comments:
cultural notes:
germination code:
native range: