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Freshwater Tidal Marsh

Photos: salicicola.com

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Overview

Mixed herbaceous marsh flooded by daily tides, and occurring in the freshwater reach of coastal rivers.

Freshwater tidal marshes occur along free-flowing coastal rivers. Tidal amplitude may range from 0 to 150 cm, and average annual salinity is less than 0.5 ppt. [from 0.5 ppt. to 5 pp. salinity, there is a gradient of species to the more clearly brackish, which has an average annual salinity of 5-18 ppt.]. This community occurs upstream of brackish tidal marsh, in the upper limits of tidal influence. The community may often be structurally diverse, including high marsh, low marsh, mud flats, rocky shore, ditches and seepages.

Photos credit to salicicola.com (unless otherwise noted). Natural communities information extracted from the Massachusetts Division of Fisheries and Wildlife Natural Heritage and Endangered Species Program (NHESP). NHESP's Freshwater Tidal Marsh natural community page.

 

SEMPBA Archives: Freshwater Tidal Marsh

 

Species Name

blue joint (Calamagrostis canadensis)

tussock sedge (Carex stricta)

narrow-leaved cattail (Typha angustifolia)

wild rice (Zizania aquatica)

smartweeds (Polygonum punctatum)

tearthumbs (Polygonum arifolium)

false pimpernel (Lindernia dubia)

jewelweed (Impatiens capensis)

climbing hempweed (Mikania scandens)

sweet flag (Acorus calamus)

buttonbush (Cephalanthus occidentalis)

silky dogwood (Cornus amomum)

soft-stem bulrush (Schoenoplectus tabernaemontani)

grass-leaf arrowhead (Sagittaria graminea)

pickerel-weed (Pontederia cordata)

water dock (Rumex orbiculatus)

freshwater cord-grass (Spartina pectinata)

three-square (Scirpus pungens)

water hemp (Amaranthus cannabinus)

needle spike-rush (Eleocharis acicularis)

soft-stemmed spike-rush (Eleocharis obtusa)

water purslane (Ludwigia palustris)

water starwort (Callitriche palustris)

bittercress (Cardamine longii)

bittercress (Cardamine pensylvanica)

creeping spearwort (Ranunculus flammula var. reptans)

estuary beggar-ticks (Bidens hyperborea)

 

bluejoint (Calamagrostis canadensis var. canadensis)
bluejoint (Calamagrostis canadensis var. canadensis)
bluejoint (Calamagrostis canadensis var. canadensis)
tussock sedge (Carex stricta)
tussock sedge (Carex stricta)
tussock sedge (Carex stricta)
narrow-leaved cat-tail (Typha angustifolia) (The easiest way to tell narrow-leaved cattail from broad-leaved is to look for this green gap between the staminate and pistillate parts of the spike. There is a very short one in broad-leaved cattail, so that the staminate and pistillate parts are practically close together. The color of the ripe narrow-leaved spike is much like milk chocolate, while in broad-leaved it's more like dark chocolate.)
narrow-leaved cattail (Typha angustifolia)
wild rice (Zizania aquatica)

wild rice (Zizania aquatica)

wild rice (Zizania aquatica)

smartweeds (Polygonum punctatum)
smartweeds (Polygonum punctatum)
smartweeds (Polygonum punctatum)
smartweeds (Polygonum punctatum)
tearthumbs (Polygonum arifolium)
tearthumbs (Polygonum arifolium)
tearthumbs (Polygonum arifolium)
false pimpernel (Lindernia dubia)
false pimpernel (Lindernia dubia)
false pimpernel (Lindernia dubia)
jewelweed (Impatiens capensis)
jewelweed (Impatiens capensis)
jewelweed (Impatiens capensis)
jewelweed (Impatiens capensis)
climbing hempweed (Mikania scandens)

climbing hempweed (Mikania scandens)

climbing hempweed (Mikania scandens)
climbing hempweed (Mikania scandens)
sweet flag (Acorus americanus)
sweet flag (Acorus americanus)
sweet flag (Acorus americanus)
buttonbush (Cephalanthus occidentalis)
buttonbush (Cephalanthus occidentalis)
buttonbush (Cephalanthus occidentalis)
silky dogwood (Cornus amomum)
silky dogwood (Cornus amomum)
silky dogwood (Cornus amomum)
soft-stem bulrush (Schoenoplectus tabernaemontani)
soft-stem bulrush (Schoenoplectus tabernaemontani)
soft-stem bulrush (Schoenoplectus tabernaemontani)
soft-stem bulrush (Schoenoplectus tabernaemontani)
grass-leaf arrowhead (Sagittaria graminea)
grass-leaf arrowhead (Sagittaria graminea)
grass-leaf arrowhead (Sagittaria graminea)
grass-leaf arrowhead (Sagittaria graminea)
pickerel-weed (Pontederia cordata)
pickerel-weed (Pontederia cordata)
pickerel-weed (Pontederia cordata)
pickerel-weed (Pontederia cordata)
water dock (Rumex orbiculatus)
water dock (Rumex orbiculatus)
water dock (Rumex orbiculatus)
water dock (Rumex orbiculatus)
freshwater cord-grass (Spartina pectinata)
freshwater cord-grass (Spartina pectinata)
freshwater cord-grass (Spartina pectinata)
freshwater cord-grass (Spartina pectinata)
three-square (Scirpus pungens)
three-square (Scirpus pungens)
three-square (Scirpus pungens)
three-square (Scirpus pungens)

water hemp (Amaranthus cannabinus)

 

Photo credit: Sheryl Pollock 2011, http://www.discoverlife.org/mp/20q?search=Amaranthus+cannabinus

water hemp (Amaranthus cannabinus)

 

Photo credit: Gary John Peresta, http://www.inaturalist.org/photos/4573486

needle spike-rush (Eleocharis acicularis)
needle spike-rush (Eleocharis acicularis)
needle spike-rush (Eleocharis acicularis)
needle spike-rush (Eleocharis acicularis)
soft-stemmed spike-rush (Eleocharis obtusa)
soft-stemmed spike-rush (Eleocharis obtusa)
soft-stemmed spike-rush (Eleocharis obtusa)
soft-stemmed spike-rush (Eleocharis obtusa)
water purslane (Ludwigia palustris)
water purslane (Ludwigia palustris)
water purslane (Ludwigia palustris)
water purslane (Ludwigia palustris)
water starwort (Callitriche palustris)
water starwort (Callitriche palustris)
water starwort (Callitriche palustris)

Long's bittercress (Cardamine longii)

 

Photo credit: http://southbaytaskforce.blogspot.com

bittercress (Cardamine pensylvanica)
bittercress (Cardamine pensylvanica)
bittercress (Cardamine pensylvanica)
bittercress (Cardamine pensylvanica)
creeping spearwort (Ranunculus flammula var. reptans)
creeping spearwort (Ranunculus flammula var. reptans)
creeping spearwort (Ranunculus flammula var. reptans)
creeping spearwort (Ranunculus flammula var. reptans)

estuary beggar-ticks (Bidens hyperborea)

 

Photo credit:
http://www.domainejoly.com/fr/nouvelles/2014/11/20/herborisation-sur-les-berges-du-fleuve-saint-laurent-domaine-joly-de-lotbiniere-partie-2/

estuary beggar-ticks (Bidens hyperborea)

 

Photo credit:
http://www.domainejoly.com/fr/nouvelles/2014/11/20/herborisation-sur-les-berges-du-fleuve-saint-laurent-domaine-joly-de-lotbiniere-partie-2/